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Finding the Fourth Proportional to 485,666.40, 728,499.60 and 130,716.30

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Solution

The fourth proportional to 485,666.40, 728,499.60 and 130,716.30 is: 196,074.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,666.40 : 728,499.60 = 130,716.30 : x
  2. Step 2: Convert to fraction form
    485,666.40/728,499.60 = 130,716.30/x
  3. Step 3: Cross multiply
    485,666.40x = 728,499.60 × 130,716.30
  4. Step 4: Simplify right side
    485,666.40x = 95,226,772,263.48
  5. Step 5: Solve for x
    x = 95,226,772,263.48/485,666.40
  6. Step 6: Final answer
    x = 196,074.45

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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.