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Finding the Fourth Proportional to 713,781.02, 985,045.38 and 391,504.70

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Solution

The fourth proportional to 713,781.02, 985,045.38 and 391,504.70 is: 540,291.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,781.02 : 985,045.38 = 391,504.70 : x
  2. Step 2: Convert to fraction form
    713,781.02/985,045.38 = 391,504.70/x
  3. Step 3: Cross multiply
    713,781.02x = 985,045.38 × 391,504.70
  4. Step 4: Simplify right side
    713,781.02x = 385,649,895,983.29
  5. Step 5: Solve for x
    x = 385,649,895,983.29/713,781.02
  6. Step 6: Final answer
    x = 540,291.61

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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.