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Finding the Fourth Proportional to 964.65, 1,331.40 and 545.00

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Solution

The fourth proportional to 964.65, 1,331.40 and 545.00 is: 752.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.65 : 1,331.40 = 545.00 : x
  2. Step 2: Convert to fraction form
    964.65/1,331.40 = 545.00/x
  3. Step 3: Cross multiply
    964.65x = 1,331.40 × 545.00
  4. Step 4: Simplify right side
    964.65x = 725,606.34
  5. Step 5: Solve for x
    x = 725,606.34/964.65
  6. Step 6: Final answer
    x = 752.20

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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.