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Finding the Fourth Proportional to 970.11, 1,455.90 and 710.79

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Solution

The fourth proportional to 970.11, 1,455.90 and 710.79 is: 1,066.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.11 : 1,455.90 = 710.79 : x
  2. Step 2: Convert to fraction form
    970.11/1,455.90 = 710.79/x
  3. Step 3: Cross multiply
    970.11x = 1,455.90 × 710.79
  4. Step 4: Simplify right side
    970.11x = 1,034,831.04
  5. Step 5: Solve for x
    x = 1,034,831.04/970.11
  6. Step 6: Final answer
    x = 1,066.72

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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.