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Finding the Fourth Proportional to 1,359, 1,875.90 and 945.24

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Solution

The fourth proportional to 1,359, 1,875.90 and 945.24 is: 1,304.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359 : 1,875.90 = 945.24 : x
  2. Step 2: Convert to fraction form
    1,359/1,875.90 = 945.24/x
  3. Step 3: Cross multiply
    1,359x = 1,875.90 × 945.24
  4. Step 4: Simplify right side
    1,359x = 1,773,175.72
  5. Step 5: Solve for x
    x = 1,773,175.72/1,359
  6. Step 6: Final answer
    x = 1,304.77

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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.