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Finding the Fourth Proportional to 904.49, 1,248.25 and 511.55

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Solution

The fourth proportional to 904.49, 1,248.25 and 511.55 is: 705.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.49 : 1,248.25 = 511.55 : x
  2. Step 2: Convert to fraction form
    904.49/1,248.25 = 511.55/x
  3. Step 3: Cross multiply
    904.49x = 1,248.25 × 511.55
  4. Step 4: Simplify right side
    904.49x = 638,542.29
  5. Step 5: Solve for x
    x = 638,542.29/904.49
  6. Step 6: Final answer
    x = 705.97

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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.