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Finding the Fourth Proportional to 765,908.60, 1,056,265.80 and 479,454.80

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Solution

The fourth proportional to 765,908.60, 1,056,265.80 and 479,454.80 is: 661,216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,908.60 : 1,056,265.80 = 479,454.80 : x
  2. Step 2: Convert to fraction form
    765,908.60/1,056,265.80 = 479,454.80/x
  3. Step 3: Cross multiply
    765,908.60x = 1,056,265.80 × 479,454.80
  4. Step 4: Simplify right side
    765,908.60x = 506,431,707,885.84
  5. Step 5: Solve for x
    x = 506,431,707,885.84/765,908.60
  6. Step 6: Final answer
    x = 661,216.90

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Double scale
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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.