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Finding the Fourth Proportional to 899.68, 1,240.23 and 567.85

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Solution

The fourth proportional to 899.68, 1,240.23 and 567.85 is: 782.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.68 : 1,240.23 = 567.85 : x
  2. Step 2: Convert to fraction form
    899.68/1,240.23 = 567.85/x
  3. Step 3: Cross multiply
    899.68x = 1,240.23 × 567.85
  4. Step 4: Simplify right side
    899.68x = 704,264.61
  5. Step 5: Solve for x
    x = 704,264.61/899.68
  6. Step 6: Final answer
    x = 782.79

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Double scale
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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.