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Finding the Fourth Proportional to 790.24, 1,089.28 and 603.12

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Solution

The fourth proportional to 790.24, 1,089.28 and 603.12 is: 831.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.24 : 1,089.28 = 603.12 : x
  2. Step 2: Convert to fraction form
    790.24/1,089.28 = 603.12/x
  3. Step 3: Cross multiply
    790.24x = 1,089.28 × 603.12
  4. Step 4: Simplify right side
    790.24x = 656,966.55
  5. Step 5: Solve for x
    x = 656,966.55/790.24
  6. Step 6: Final answer
    x = 831.35

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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.