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Finding the Fourth Proportional to 478,712.40, 718,068.60 and 292,088.40

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Solution

The fourth proportional to 478,712.40, 718,068.60 and 292,088.40 is: 438,132.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,712.40 : 718,068.60 = 292,088.40 : x
  2. Step 2: Convert to fraction form
    478,712.40/718,068.60 = 292,088.40/x
  3. Step 3: Cross multiply
    478,712.40x = 718,068.60 × 292,088.40
  4. Step 4: Simplify right side
    478,712.40x = 209,739,508,464.24
  5. Step 5: Solve for x
    x = 209,739,508,464.24/478,712.40
  6. Step 6: Final answer
    x = 438,132.60

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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.