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Finding the Fourth Proportional to 508,143.85, 699,478.54 and 439,201.91

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Solution

The fourth proportional to 508,143.85, 699,478.54 and 439,201.91 is: 604,577.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,143.85 : 699,478.54 = 439,201.91 : x
  2. Step 2: Convert to fraction form
    508,143.85/699,478.54 = 439,201.91/x
  3. Step 3: Cross multiply
    508,143.85x = 699,478.54 × 439,201.91
  4. Step 4: Simplify right side
    508,143.85x = 307,212,311,422.70
  5. Step 5: Solve for x
    x = 307,212,311,422.70/508,143.85
  6. Step 6: Final answer
    x = 604,577.45

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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.