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Finding the Fourth Proportional to 713,766.15, 985,024.89 and 391,489.83

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Solution

The fourth proportional to 713,766.15, 985,024.89 and 391,489.83 is: 540,271.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,766.15 : 985,024.89 = 391,489.83 : x
  2. Step 2: Convert to fraction form
    713,766.15/985,024.89 = 391,489.83/x
  3. Step 3: Cross multiply
    713,766.15x = 985,024.89 × 391,489.83
  4. Step 4: Simplify right side
    713,766.15x = 385,627,226,731.87
  5. Step 5: Solve for x
    x = 385,627,226,731.87/713,766.15
  6. Step 6: Final answer
    x = 540,271.11

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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.