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Finding the Fourth Proportional to 918.77, 1,267.75 and 525.71

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Solution

The fourth proportional to 918.77, 1,267.75 and 525.71 is: 725.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.77 : 1,267.75 = 525.71 : x
  2. Step 2: Convert to fraction form
    918.77/1,267.75 = 525.71/x
  3. Step 3: Cross multiply
    918.77x = 1,267.75 × 525.71
  4. Step 4: Simplify right side
    918.77x = 666,470.71
  5. Step 5: Solve for x
    x = 666,470.71/918.77
  6. Step 6: Final answer
    x = 725.40

Related Problems

Find fourth proportional to 459.38, 633.87 and 262.86
Half scale
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Double scale
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Similar ratio
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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.