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Finding the Fourth Proportional to 970.33, 1,339.07 and 556.25

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Solution

The fourth proportional to 970.33, 1,339.07 and 556.25 is: 767.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.33 : 1,339.07 = 556.25 : x
  2. Step 2: Convert to fraction form
    970.33/1,339.07 = 556.25/x
  3. Step 3: Cross multiply
    970.33x = 1,339.07 × 556.25
  4. Step 4: Simplify right side
    970.33x = 744,854.91
  5. Step 5: Solve for x
    x = 744,854.91/970.33
  6. Step 6: Final answer
    x = 767.63

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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.