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Finding the Fourth Proportional to 690,966.88, 953,494.95 and 380,807.92

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Solution

The fourth proportional to 690,966.88, 953,494.95 and 380,807.92 is: 525,493.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,966.88 : 953,494.95 = 380,807.92 : x
  2. Step 2: Convert to fraction form
    690,966.88/953,494.95 = 380,807.92/x
  3. Step 3: Cross multiply
    690,966.88x = 953,494.95 × 380,807.92
  4. Step 4: Simplify right side
    690,966.88x = 363,098,428,640.00
  5. Step 5: Solve for x
    x = 363,098,428,640.00/690,966.88
  6. Step 6: Final answer
    x = 525,493.25

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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.