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Finding the Fourth Proportional to 966.17, 1,445.60 and 555.50

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Solution

The fourth proportional to 966.17, 1,445.60 and 555.50 is: 831.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.17 : 1,445.60 = 555.50 : x
  2. Step 2: Convert to fraction form
    966.17/1,445.60 = 555.50/x
  3. Step 3: Cross multiply
    966.17x = 1,445.60 × 555.50
  4. Step 4: Simplify right side
    966.17x = 803,024.96
  5. Step 5: Solve for x
    x = 803,024.96/966.17
  6. Step 6: Final answer
    x = 831.15

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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.