Home / 717,890.18-990,686.40-395,600.19

Finding the Fourth Proportional to 717,890.18, 990,686.40 and 395,600.19

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Solution

The fourth proportional to 717,890.18, 990,686.40 and 395,600.19 is: 545,927.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,890.18 : 990,686.40 = 395,600.19 : x
  2. Step 2: Convert to fraction form
    717,890.18/990,686.40 = 395,600.19/x
  3. Step 3: Cross multiply
    717,890.18x = 990,686.40 × 395,600.19
  4. Step 4: Simplify right side
    717,890.18x = 391,915,722,871.84
  5. Step 5: Solve for x
    x = 391,915,722,871.84/717,890.18
  6. Step 6: Final answer
    x = 545,927.13

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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.