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Finding the Fourth Proportional to 864.76, 1,193.64 and 584.80

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Solution

The fourth proportional to 864.76, 1,193.64 and 584.80 is: 807.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.76 : 1,193.64 = 584.80 : x
  2. Step 2: Convert to fraction form
    864.76/1,193.64 = 584.80/x
  3. Step 3: Cross multiply
    864.76x = 1,193.64 × 584.80
  4. Step 4: Simplify right side
    864.76x = 698,040.67
  5. Step 5: Solve for x
    x = 698,040.67/864.76
  6. Step 6: Final answer
    x = 807.21

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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.