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Finding the Fourth Proportional to 970.20, 1,339.47 and 597.68

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Solution

The fourth proportional to 970.20, 1,339.47 and 597.68 is: 825.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.20 : 1,339.47 = 597.68 : x
  2. Step 2: Convert to fraction form
    970.20/1,339.47 = 597.68/x
  3. Step 3: Cross multiply
    970.20x = 1,339.47 × 597.68
  4. Step 4: Simplify right side
    970.20x = 800,580.29
  5. Step 5: Solve for x
    x = 800,580.29/970.20
  6. Step 6: Final answer
    x = 825.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.