Home / 717,996.18-990,815.29-395,706.20

Finding the Fourth Proportional to 717,996.18, 990,815.29 and 395,706.20

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Solution

The fourth proportional to 717,996.18, 990,815.29 and 395,706.20 is: 546,063.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,996.18 : 990,815.29 = 395,706.20 : x
  2. Step 2: Convert to fraction form
    717,996.18/990,815.29 = 395,706.20/x
  3. Step 3: Cross multiply
    717,996.18x = 990,815.29 × 395,706.20
  4. Step 4: Simplify right side
    717,996.18x = 392,071,747,364.46
  5. Step 5: Solve for x
    x = 392,071,747,364.46/717,996.18
  6. Step 6: Final answer
    x = 546,063.83

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Double scale
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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.