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Finding the Fourth Proportional to 970.52, 1,339.28 and 556.52

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Solution

The fourth proportional to 970.52, 1,339.28 and 556.52 is: 767.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.52 : 1,339.28 = 556.52 : x
  2. Step 2: Convert to fraction form
    970.52/1,339.28 = 556.52/x
  3. Step 3: Cross multiply
    970.52x = 1,339.28 × 556.52
  4. Step 4: Simplify right side
    970.52x = 745,336.11
  5. Step 5: Solve for x
    x = 745,336.11/970.52
  6. Step 6: Final answer
    x = 767.98

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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.