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Finding the Fourth Proportional to 714,813.68, 986,404.20 and 392,566.16

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Solution

The fourth proportional to 714,813.68, 986,404.20 and 392,566.16 is: 541,720.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,813.68 : 986,404.20 = 392,566.16 : x
  2. Step 2: Convert to fraction form
    714,813.68/986,404.20 = 392,566.16/x
  3. Step 3: Cross multiply
    714,813.68x = 986,404.20 × 392,566.16
  4. Step 4: Simplify right side
    714,813.68x = 387,228,909,001.87
  5. Step 5: Solve for x
    x = 387,228,909,001.87/714,813.68
  6. Step 6: Final answer
    x = 541,720.06

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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.