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Finding the Fourth Proportional to 972.22, 1,458.62 and 561.66

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Solution

The fourth proportional to 972.22, 1,458.62 and 561.66 is: 842.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.22 : 1,458.62 = 561.66 : x
  2. Step 2: Convert to fraction form
    972.22/1,458.62 = 561.66/x
  3. Step 3: Cross multiply
    972.22x = 1,458.62 × 561.66
  4. Step 4: Simplify right side
    972.22x = 819,248.51
  5. Step 5: Solve for x
    x = 819,248.51/972.22
  6. Step 6: Final answer
    x = 842.66

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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.