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Finding the Fourth Proportional to 936.65, 1,292.72 and 558.75

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Solution

The fourth proportional to 936.65, 1,292.72 and 558.75 is: 771.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.65 : 1,292.72 = 558.75 : x
  2. Step 2: Convert to fraction form
    936.65/1,292.72 = 558.75/x
  3. Step 3: Cross multiply
    936.65x = 1,292.72 × 558.75
  4. Step 4: Simplify right side
    936.65x = 722,304.51
  5. Step 5: Solve for x
    x = 722,304.51/936.65
  6. Step 6: Final answer
    x = 771.16

Related Problems

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Half scale
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Double scale
Find fourth proportional to 937.65, 1,294.10 and 559.75
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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.