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Finding the Fourth Proportional to 519,908.60, 779,862.90 and 145,931.60

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Solution

The fourth proportional to 519,908.60, 779,862.90 and 145,931.60 is: 218,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,908.60 : 779,862.90 = 145,931.60 : x
  2. Step 2: Convert to fraction form
    519,908.60/779,862.90 = 145,931.60/x
  3. Step 3: Cross multiply
    519,908.60x = 779,862.90 × 145,931.60
  4. Step 4: Simplify right side
    519,908.60x = 113,806,640,777.64
  5. Step 5: Solve for x
    x = 113,806,640,777.64/519,908.60
  6. Step 6: Final answer
    x = 218,897.40

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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.