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Finding the Fourth Proportional to 521,589.60, 719,964.72 and 306,719.28

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Solution

The fourth proportional to 521,589.60, 719,964.72 and 306,719.28 is: 423,373.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,589.60 : 719,964.72 = 306,719.28 : x
  2. Step 2: Convert to fraction form
    521,589.60/719,964.72 = 306,719.28/x
  3. Step 3: Cross multiply
    521,589.60x = 719,964.72 × 306,719.28
  4. Step 4: Simplify right side
    521,589.60x = 220,827,060,543.80
  5. Step 5: Solve for x
    x = 220,827,060,543.80/521,589.60
  6. Step 6: Final answer
    x = 423,373.20

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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.