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Finding the Fourth Proportional to 900.80, 1,243.24 and 652.92

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Solution

The fourth proportional to 900.80, 1,243.24 and 652.92 is: 901.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.80 : 1,243.24 = 652.92 : x
  2. Step 2: Convert to fraction form
    900.80/1,243.24 = 652.92/x
  3. Step 3: Cross multiply
    900.80x = 1,243.24 × 652.92
  4. Step 4: Simplify right side
    900.80x = 811,736.26
  5. Step 5: Solve for x
    x = 811,736.26/900.80
  6. Step 6: Final answer
    x = 901.13

Related Problems

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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.