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Finding the Fourth Proportional to 970.90, 1,456.55 and 322.09

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Solution

The fourth proportional to 970.90, 1,456.55 and 322.09 is: 483.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.90 : 1,456.55 = 322.09 : x
  2. Step 2: Convert to fraction form
    970.90/1,456.55 = 322.09/x
  3. Step 3: Cross multiply
    970.90x = 1,456.55 × 322.09
  4. Step 4: Simplify right side
    970.90x = 469,140.19
  5. Step 5: Solve for x
    x = 469,140.19/970.90
  6. Step 6: Final answer
    x = 483.20

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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.