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Finding the Fourth Proportional to 713,772.15, 985,041.66 and 391,512.24

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Solution

The fourth proportional to 713,772.15, 985,041.66 and 391,512.24 is: 540,306.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,772.15 : 985,041.66 = 391,512.24 : x
  2. Step 2: Convert to fraction form
    713,772.15/985,041.66 = 391,512.24/x
  3. Step 3: Cross multiply
    713,772.15x = 985,041.66 × 391,512.24
  4. Step 4: Simplify right side
    713,772.15x = 385,655,866,799.92
  5. Step 5: Solve for x
    x = 385,655,866,799.92/713,772.15
  6. Step 6: Final answer
    x = 540,306.69

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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.