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Finding the Fourth Proportional to 717,042.40, 989,502.94 and 394,740.16

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Solution

The fourth proportional to 717,042.40, 989,502.94 and 394,740.16 is: 544,732.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,042.40 : 989,502.94 = 394,740.16 : x
  2. Step 2: Convert to fraction form
    717,042.40/989,502.94 = 394,740.16/x
  3. Step 3: Cross multiply
    717,042.40x = 989,502.94 × 394,740.16
  4. Step 4: Simplify right side
    717,042.40x = 390,596,548,856.07
  5. Step 5: Solve for x
    x = 390,596,548,856.07/717,042.40
  6. Step 6: Final answer
    x = 544,732.85

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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.