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Finding the Fourth Proportional to 1,043.03, 1,564.54 and 312.61

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Solution

The fourth proportional to 1,043.03, 1,564.54 and 312.61 is: 468.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.03 : 1,564.54 = 312.61 : x
  2. Step 2: Convert to fraction form
    1,043.03/1,564.54 = 312.61/x
  3. Step 3: Cross multiply
    1,043.03x = 1,564.54 × 312.61
  4. Step 4: Simplify right side
    1,043.03x = 489,089.97
  5. Step 5: Solve for x
    x = 489,089.97/1,043.03
  6. Step 6: Final answer
    x = 468.91

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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.