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Finding the Fourth Proportional to 1,359, 1,875.42 and 738

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Solution

The fourth proportional to 1,359, 1,875.42 and 738 is: 1,018.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359 : 1,875.42 = 738 : x
  2. Step 2: Convert to fraction form
    1,359/1,875.42 = 738/x
  3. Step 3: Cross multiply
    1,359x = 1,875.42 × 738
  4. Step 4: Simplify right side
    1,359x = 1,384,059.96
  5. Step 5: Solve for x
    x = 1,384,059.96/1,359
  6. Step 6: Final answer
    x = 1,018.44

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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.