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Finding the Fourth Proportional to 656,294.28, 905,686.08 and 354,488.28

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Solution

The fourth proportional to 656,294.28, 905,686.08 and 354,488.28 is: 489,193.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,294.28 : 905,686.08 = 354,488.28 : x
  2. Step 2: Convert to fraction form
    656,294.28/905,686.08 = 354,488.28/x
  3. Step 3: Cross multiply
    656,294.28x = 905,686.08 × 354,488.28
  4. Step 4: Simplify right side
    656,294.28x = 321,055,100,719.14
  5. Step 5: Solve for x
    x = 321,055,100,719.14/656,294.28
  6. Step 6: Final answer
    x = 489,193.81

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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.