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Finding the Fourth Proportional to 926.35, 1,276.17 and 646.08

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Solution

The fourth proportional to 926.35, 1,276.17 and 646.08 is: 890.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.35 : 1,276.17 = 646.08 : x
  2. Step 2: Convert to fraction form
    926.35/1,276.17 = 646.08/x
  3. Step 3: Cross multiply
    926.35x = 1,276.17 × 646.08
  4. Step 4: Simplify right side
    926.35x = 824,500.71
  5. Step 5: Solve for x
    x = 824,500.71/926.35
  6. Step 6: Final answer
    x = 890.06

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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.