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Finding the Fourth Proportional to 520,387.80, 718,095.27 and 316,410.42

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Solution

The fourth proportional to 520,387.80, 718,095.27 and 316,410.42 is: 436,622.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,387.80 : 718,095.27 = 316,410.42 : x
  2. Step 2: Convert to fraction form
    520,387.80/718,095.27 = 316,410.42/x
  3. Step 3: Cross multiply
    520,387.80x = 718,095.27 × 316,410.42
  4. Step 4: Simplify right side
    520,387.80x = 227,212,825,980.71
  5. Step 5: Solve for x
    x = 227,212,825,980.71/520,387.80
  6. Step 6: Final answer
    x = 436,622.12

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1.5x scale

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.