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Finding the Fourth Proportional to 508,142.82, 699,476.70 and 439,200.69

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Solution

The fourth proportional to 508,142.82, 699,476.70 and 439,200.69 is: 604,575.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,142.82 : 699,476.70 = 439,200.69 : x
  2. Step 2: Convert to fraction form
    508,142.82/699,476.70 = 439,200.69/x
  3. Step 3: Cross multiply
    508,142.82x = 699,476.70 × 439,200.69
  4. Step 4: Simplify right side
    508,142.82x = 307,210,649,278.92
  5. Step 5: Solve for x
    x = 307,210,649,278.92/508,142.82
  6. Step 6: Final answer
    x = 604,575.40

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.