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Finding the Fourth Proportional to 1,011.26, 1,395.20 and 657.62

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Solution

The fourth proportional to 1,011.26, 1,395.20 and 657.62 is: 907.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.26 : 1,395.20 = 657.62 : x
  2. Step 2: Convert to fraction form
    1,011.26/1,395.20 = 657.62/x
  3. Step 3: Cross multiply
    1,011.26x = 1,395.20 × 657.62
  4. Step 4: Simplify right side
    1,011.26x = 917,509.47
  5. Step 5: Solve for x
    x = 917,509.47/1,011.26
  6. Step 6: Final answer
    x = 907.29

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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.