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Finding the Fourth Proportional to 1,002.59, 1,503.48 and 385.95

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Solution

The fourth proportional to 1,002.59, 1,503.48 and 385.95 is: 578.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.59 : 1,503.48 = 385.95 : x
  2. Step 2: Convert to fraction form
    1,002.59/1,503.48 = 385.95/x
  3. Step 3: Cross multiply
    1,002.59x = 1,503.48 × 385.95
  4. Step 4: Simplify right side
    1,002.59x = 580,269.07
  5. Step 5: Solve for x
    x = 580,269.07/1,002.59
  6. Step 6: Final answer
    x = 578.77

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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.