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Finding the Fourth Proportional to 972.41, 1,342.15 and 553.00

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Solution

The fourth proportional to 972.41, 1,342.15 and 553.00 is: 763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.41 : 1,342.15 = 553.00 : x
  2. Step 2: Convert to fraction form
    972.41/1,342.15 = 553.00/x
  3. Step 3: Cross multiply
    972.41x = 1,342.15 × 553.00
  4. Step 4: Simplify right side
    972.41x = 742,204.21
  5. Step 5: Solve for x
    x = 742,204.21/972.41
  6. Step 6: Final answer
    x = 763.26

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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.