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Finding the Fourth Proportional to 970.03, 1,455.27 and 422.07

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Solution

The fourth proportional to 970.03, 1,455.27 and 422.07 is: 633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.03 : 1,455.27 = 422.07 : x
  2. Step 2: Convert to fraction form
    970.03/1,455.27 = 422.07/x
  3. Step 3: Cross multiply
    970.03x = 1,455.27 × 422.07
  4. Step 4: Simplify right side
    970.03x = 614,225.81
  5. Step 5: Solve for x
    x = 614,225.81/970.03
  6. Step 6: Final answer
    x = 633.20

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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.