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Finding the Fourth Proportional to 972.03, 1,457.12 and 322.31

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Solution

The fourth proportional to 972.03, 1,457.12 and 322.31 is: 483.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.03 : 1,457.12 = 322.31 : x
  2. Step 2: Convert to fraction form
    972.03/1,457.12 = 322.31/x
  3. Step 3: Cross multiply
    972.03x = 1,457.12 × 322.31
  4. Step 4: Simplify right side
    972.03x = 469,648.80
  5. Step 5: Solve for x
    x = 469,648.80/972.03
  6. Step 6: Final answer
    x = 483.16

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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.