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Finding the Fourth Proportional to 675.32, 1,011.23 and 578.45

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Solution

The fourth proportional to 675.32, 1,011.23 and 578.45 is: 866.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.32 : 1,011.23 = 578.45 : x
  2. Step 2: Convert to fraction form
    675.32/1,011.23 = 578.45/x
  3. Step 3: Cross multiply
    675.32x = 1,011.23 × 578.45
  4. Step 4: Simplify right side
    675.32x = 584,948.21
  5. Step 5: Solve for x
    x = 584,948.21/675.32
  6. Step 6: Final answer
    x = 866.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.