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Finding the Fourth Proportional to 945.80, 1,305.23 and 572.71

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Solution

The fourth proportional to 945.80, 1,305.23 and 572.71 is: 790.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.80 : 1,305.23 = 572.71 : x
  2. Step 2: Convert to fraction form
    945.80/1,305.23 = 572.71/x
  3. Step 3: Cross multiply
    945.80x = 1,305.23 × 572.71
  4. Step 4: Simplify right side
    945.80x = 747,518.27
  5. Step 5: Solve for x
    x = 747,518.27/945.80
  6. Step 6: Final answer
    x = 790.36

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Double scale
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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.