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Finding the Fourth Proportional to 810.12, 1,117.62 and 530.26

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Solution

The fourth proportional to 810.12, 1,117.62 and 530.26 is: 731.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.12 : 1,117.62 = 530.26 : x
  2. Step 2: Convert to fraction form
    810.12/1,117.62 = 530.26/x
  3. Step 3: Cross multiply
    810.12x = 1,117.62 × 530.26
  4. Step 4: Simplify right side
    810.12x = 592,629.18
  5. Step 5: Solve for x
    x = 592,629.18/810.12
  6. Step 6: Final answer
    x = 731.53

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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.