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Finding the Fourth Proportional to 644,165.40, 888,931.17 and 357,678.12

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Solution

The fourth proportional to 644,165.40, 888,931.17 and 357,678.12 is: 493,586.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,165.40 : 888,931.17 = 357,678.12 : x
  2. Step 2: Convert to fraction form
    644,165.40/888,931.17 = 357,678.12/x
  3. Step 3: Cross multiply
    644,165.40x = 888,931.17 × 357,678.12
  4. Step 4: Simplify right side
    644,165.40x = 317,951,229,695.00
  5. Step 5: Solve for x
    x = 317,951,229,695.00/644,165.40
  6. Step 6: Final answer
    x = 493,586.32

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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.