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Finding the Fourth Proportional to 717,319.72, 989,904.18 and 411,407.92

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Solution

The fourth proportional to 717,319.72, 989,904.18 and 411,407.92 is: 567,744.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,319.72 : 989,904.18 = 411,407.92 : x
  2. Step 2: Convert to fraction form
    717,319.72/989,904.18 = 411,407.92/x
  3. Step 3: Cross multiply
    717,319.72x = 989,904.18 × 411,407.92
  4. Step 4: Simplify right side
    717,319.72x = 407,254,419,693.11
  5. Step 5: Solve for x
    x = 407,254,419,693.11/717,319.72
  6. Step 6: Final answer
    x = 567,744.63

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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.