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Finding the Fourth Proportional to 520,086.13, 717,718.85 and 281,622.13

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Solution

The fourth proportional to 520,086.13, 717,718.85 and 281,622.13 is: 388,638.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,086.13 : 717,718.85 = 281,622.13 : x
  2. Step 2: Convert to fraction form
    520,086.13/717,718.85 = 281,622.13/x
  3. Step 3: Cross multiply
    520,086.13x = 717,718.85 × 281,622.13
  4. Step 4: Simplify right side
    520,086.13x = 202,125,511,278.15
  5. Step 5: Solve for x
    x = 202,125,511,278.15/520,086.13
  6. Step 6: Final answer
    x = 388,638.53

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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.