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Finding the Fourth Proportional to 717,146.20, 989,653.62 and 394,849.72

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Solution

The fourth proportional to 717,146.20, 989,653.62 and 394,849.72 is: 544,888.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,146.20 : 989,653.62 = 394,849.72 : x
  2. Step 2: Convert to fraction form
    717,146.20/989,653.62 = 394,849.72/x
  3. Step 3: Cross multiply
    717,146.20x = 989,653.62 × 394,849.72
  4. Step 4: Simplify right side
    717,146.20x = 390,764,454,753.99
  5. Step 5: Solve for x
    x = 390,764,454,753.99/717,146.20
  6. Step 6: Final answer
    x = 544,888.13

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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.