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Finding the Fourth Proportional to 926.49, 1,388.58 and 810.66

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Solution

The fourth proportional to 926.49, 1,388.58 and 810.66 is: 1,214.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.49 : 1,388.58 = 810.66 : x
  2. Step 2: Convert to fraction form
    926.49/1,388.58 = 810.66/x
  3. Step 3: Cross multiply
    926.49x = 1,388.58 × 810.66
  4. Step 4: Simplify right side
    926.49x = 1,125,666.26
  5. Step 5: Solve for x
    x = 1,125,666.26/926.49
  6. Step 6: Final answer
    x = 1,214.98

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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.