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Finding the Fourth Proportional to 898.63, 1,240.38 and 525.69

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Solution

The fourth proportional to 898.63, 1,240.38 and 525.69 is: 725.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.63 : 1,240.38 = 525.69 : x
  2. Step 2: Convert to fraction form
    898.63/1,240.38 = 525.69/x
  3. Step 3: Cross multiply
    898.63x = 1,240.38 × 525.69
  4. Step 4: Simplify right side
    898.63x = 652,055.36
  5. Step 5: Solve for x
    x = 652,055.36/898.63
  6. Step 6: Final answer
    x = 725.61

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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.