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Finding the Fourth Proportional to 864.04, 1,293.18 and 621.04

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Solution

The fourth proportional to 864.04, 1,293.18 and 621.04 is: 929.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.04 : 1,293.18 = 621.04 : x
  2. Step 2: Convert to fraction form
    864.04/1,293.18 = 621.04/x
  3. Step 3: Cross multiply
    864.04x = 1,293.18 × 621.04
  4. Step 4: Simplify right side
    864.04x = 803,116.51
  5. Step 5: Solve for x
    x = 803,116.51/864.04
  6. Step 6: Final answer
    x = 929.49

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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.