Home / 717,187.20-989,710.32-394,890.72

Finding the Fourth Proportional to 717,187.20, 989,710.32 and 394,890.72

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Solution

The fourth proportional to 717,187.20, 989,710.32 and 394,890.72 is: 544,944.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,187.20 : 989,710.32 = 394,890.72 : x
  2. Step 2: Convert to fraction form
    717,187.20/989,710.32 = 394,890.72/x
  3. Step 3: Cross multiply
    717,187.20x = 989,710.32 × 394,890.72
  4. Step 4: Simplify right side
    717,187.20x = 390,827,420,856.23
  5. Step 5: Solve for x
    x = 390,827,420,856.23/717,187.20
  6. Step 6: Final answer
    x = 544,944.78

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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.