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Finding the Fourth Proportional to 661.48, 912.02 and 530.28

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Solution

The fourth proportional to 661.48, 912.02 and 530.28 is: 731.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.48 : 912.02 = 530.28 : x
  2. Step 2: Convert to fraction form
    661.48/912.02 = 530.28/x
  3. Step 3: Cross multiply
    661.48x = 912.02 × 530.28
  4. Step 4: Simplify right side
    661.48x = 483,625.97
  5. Step 5: Solve for x
    x = 483,625.97/661.48
  6. Step 6: Final answer
    x = 731.13

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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.