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Finding the Fourth Proportional to 817,686.80, 1,227,842.40 and 618,232.40

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Solution

The fourth proportional to 817,686.80, 1,227,842.40 and 618,232.40 is: 928,340.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,686.80 : 1,227,842.40 = 618,232.40 : x
  2. Step 2: Convert to fraction form
    817,686.80/1,227,842.40 = 618,232.40/x
  3. Step 3: Cross multiply
    817,686.80x = 1,227,842.40 × 618,232.40
  4. Step 4: Simplify right side
    817,686.80x = 759,091,953,773.76
  5. Step 5: Solve for x
    x = 759,091,953,773.76/817,686.80
  6. Step 6: Final answer
    x = 928,340.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.