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Finding the Fourth Proportional to 472,663.20, 708,994.80 and 140,239.20

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Solution

The fourth proportional to 472,663.20, 708,994.80 and 140,239.20 is: 210,358.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,663.20 : 708,994.80 = 140,239.20 : x
  2. Step 2: Convert to fraction form
    472,663.20/708,994.80 = 140,239.20/x
  3. Step 3: Cross multiply
    472,663.20x = 708,994.80 × 140,239.20
  4. Step 4: Simplify right side
    472,663.20x = 99,428,863,556.16
  5. Step 5: Solve for x
    x = 99,428,863,556.16/472,663.20
  6. Step 6: Final answer
    x = 210,358.80

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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.