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Finding the Fourth Proportional to 717,890.50, 990,695.44 and 395,612.16

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Solution

The fourth proportional to 717,890.50, 990,695.44 and 395,612.16 is: 545,948.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,890.50 : 990,695.44 = 395,612.16 : x
  2. Step 2: Convert to fraction form
    717,890.50/990,695.44 = 395,612.16/x
  3. Step 3: Cross multiply
    717,890.50x = 990,695.44 × 395,612.16
  4. Step 4: Simplify right side
    717,890.50x = 391,931,155,989.01
  5. Step 5: Solve for x
    x = 391,931,155,989.01/717,890.50
  6. Step 6: Final answer
    x = 545,948.38

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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.