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Finding the Fourth Proportional to 691.02, 954.45 and 545.58

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Solution

The fourth proportional to 691.02, 954.45 and 545.58 is: 753.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.02 : 954.45 = 545.58 : x
  2. Step 2: Convert to fraction form
    691.02/954.45 = 545.58/x
  3. Step 3: Cross multiply
    691.02x = 954.45 × 545.58
  4. Step 4: Simplify right side
    691.02x = 520,728.83
  5. Step 5: Solve for x
    x = 520,728.83/691.02
  6. Step 6: Final answer
    x = 753.57

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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.