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Finding the Fourth Proportional to 666,442.48, 919,687.85 and 360,518.11

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Solution

The fourth proportional to 666,442.48, 919,687.85 and 360,518.11 is: 497,513.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,442.48 : 919,687.85 = 360,518.11 : x
  2. Step 2: Convert to fraction form
    666,442.48/919,687.85 = 360,518.11/x
  3. Step 3: Cross multiply
    666,442.48x = 919,687.85 × 360,518.11
  4. Step 4: Simplify right side
    666,442.48x = 331,564,121,370.15
  5. Step 5: Solve for x
    x = 331,564,121,370.15/666,442.48
  6. Step 6: Final answer
    x = 497,513.49

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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.