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Finding the Fourth Proportional to 478,672.70, 718,009.05 and 432,016.70

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Solution

The fourth proportional to 478,672.70, 718,009.05 and 432,016.70 is: 648,025.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,672.70 : 718,009.05 = 432,016.70 : x
  2. Step 2: Convert to fraction form
    478,672.70/718,009.05 = 432,016.70/x
  3. Step 3: Cross multiply
    478,672.70x = 718,009.05 × 432,016.70
  4. Step 4: Simplify right side
    478,672.70x = 310,191,900,351.14
  5. Step 5: Solve for x
    x = 310,191,900,351.14/478,672.70
  6. Step 6: Final answer
    x = 648,025.05

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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.