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Finding the Fourth Proportional to 972.60, 1,458.90 and 956.40

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Solution

The fourth proportional to 972.60, 1,458.90 and 956.40 is: 1,434.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.60 : 1,458.90 = 956.40 : x
  2. Step 2: Convert to fraction form
    972.60/1,458.90 = 956.40/x
  3. Step 3: Cross multiply
    972.60x = 1,458.90 × 956.40
  4. Step 4: Simplify right side
    972.60x = 1,395,291.96
  5. Step 5: Solve for x
    x = 1,395,291.96/972.60
  6. Step 6: Final answer
    x = 1,434.60

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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.