Home / 513,964.15-709,278.92-281,387.20

Finding the Fourth Proportional to 513,964.15, 709,278.92 and 281,387.20

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Solution

The fourth proportional to 513,964.15, 709,278.92 and 281,387.20 is: 388,318.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,964.15 : 709,278.92 = 281,387.20 : x
  2. Step 2: Convert to fraction form
    513,964.15/709,278.92 = 281,387.20/x
  3. Step 3: Cross multiply
    513,964.15x = 709,278.92 × 281,387.20
  4. Step 4: Simplify right side
    513,964.15x = 199,582,012,420.92
  5. Step 5: Solve for x
    x = 199,582,012,420.92/513,964.15
  6. Step 6: Final answer
    x = 388,318.94

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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.