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Finding the Fourth Proportional to 749.95, 1,124.93 and 425.54

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Solution

The fourth proportional to 749.95, 1,124.93 and 425.54 is: 638.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.95 : 1,124.93 = 425.54 : x
  2. Step 2: Convert to fraction form
    749.95/1,124.93 = 425.54/x
  3. Step 3: Cross multiply
    749.95x = 1,124.93 × 425.54
  4. Step 4: Simplify right side
    749.95x = 478,706.59
  5. Step 5: Solve for x
    x = 478,706.59/749.95
  6. Step 6: Final answer
    x = 638.32

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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.