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Finding the Fourth Proportional to 571,385.60, 857,078.40 and 478,764.80

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Solution

The fourth proportional to 571,385.60, 857,078.40 and 478,764.80 is: 718,147.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,385.60 : 857,078.40 = 478,764.80 : x
  2. Step 2: Convert to fraction form
    571,385.60/857,078.40 = 478,764.80/x
  3. Step 3: Cross multiply
    571,385.60x = 857,078.40 × 478,764.80
  4. Step 4: Simplify right side
    571,385.60x = 410,338,968,760.32
  5. Step 5: Solve for x
    x = 410,338,968,760.32/571,385.60
  6. Step 6: Final answer
    x = 718,147.20

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.