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Finding the Fourth Proportional to 927.70, 1,280.01 and 578.14

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Solution

The fourth proportional to 927.70, 1,280.01 and 578.14 is: 797.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.70 : 1,280.01 = 578.14 : x
  2. Step 2: Convert to fraction form
    927.70/1,280.01 = 578.14/x
  3. Step 3: Cross multiply
    927.70x = 1,280.01 × 578.14
  4. Step 4: Simplify right side
    927.70x = 740,024.98
  5. Step 5: Solve for x
    x = 740,024.98/927.70
  6. Step 6: Final answer
    x = 797.70

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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.