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Finding the Fourth Proportional to 1,006.34, 1,388.75 and 657.63

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Solution

The fourth proportional to 1,006.34, 1,388.75 and 657.63 is: 907.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,006.34 : 1,388.75 = 657.63 : x
  2. Step 2: Convert to fraction form
    1,006.34/1,388.75 = 657.63/x
  3. Step 3: Cross multiply
    1,006.34x = 1,388.75 × 657.63
  4. Step 4: Simplify right side
    1,006.34x = 913,280.37
  5. Step 5: Solve for x
    x = 913,280.37/1,006.34
  6. Step 6: Final answer
    x = 907.53

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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.