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Finding the Fourth Proportional to 1,120.25, 1,545.95 and 654.50

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Solution

The fourth proportional to 1,120.25, 1,545.95 and 654.50 is: 903.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.25 : 1,545.95 = 654.50 : x
  2. Step 2: Convert to fraction form
    1,120.25/1,545.95 = 654.50/x
  3. Step 3: Cross multiply
    1,120.25x = 1,545.95 × 654.50
  4. Step 4: Simplify right side
    1,120.25x = 1,011,824.28
  5. Step 5: Solve for x
    x = 1,011,824.28/1,120.25
  6. Step 6: Final answer
    x = 903.21

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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.