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Finding the Fourth Proportional to 898.79, 1,240.19 and 567.67

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Solution

The fourth proportional to 898.79, 1,240.19 and 567.67 is: 783.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.79 : 1,240.19 = 567.67 : x
  2. Step 2: Convert to fraction form
    898.79/1,240.19 = 567.67/x
  3. Step 3: Cross multiply
    898.79x = 1,240.19 × 567.67
  4. Step 4: Simplify right side
    898.79x = 704,018.66
  5. Step 5: Solve for x
    x = 704,018.66/898.79
  6. Step 6: Final answer
    x = 783.30

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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.