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Finding the Fourth Proportional to 666,279.06, 919,465.11 and 360,355.47

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Solution

The fourth proportional to 666,279.06, 919,465.11 and 360,355.47 is: 497,290.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,279.06 : 919,465.11 = 360,355.47 : x
  2. Step 2: Convert to fraction form
    666,279.06/919,465.11 = 360,355.47/x
  3. Step 3: Cross multiply
    666,279.06x = 919,465.11 × 360,355.47
  4. Step 4: Simplify right side
    666,279.06x = 331,334,281,862.65
  5. Step 5: Solve for x
    x = 331,334,281,862.65/666,279.06
  6. Step 6: Final answer
    x = 497,290.55

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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.