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Finding the Fourth Proportional to 538,909.70, 808,364.55 and 455,965.70

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Solution

The fourth proportional to 538,909.70, 808,364.55 and 455,965.70 is: 683,948.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,909.70 : 808,364.55 = 455,965.70 : x
  2. Step 2: Convert to fraction form
    538,909.70/808,364.55 = 455,965.70/x
  3. Step 3: Cross multiply
    538,909.70x = 808,364.55 × 455,965.70
  4. Step 4: Simplify right side
    538,909.70x = 368,586,507,895.94
  5. Step 5: Solve for x
    x = 368,586,507,895.94/538,909.70
  6. Step 6: Final answer
    x = 683,948.55

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.