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Finding the Fourth Proportional to 672,686.40, 1,009,418.40 and 252,004.80

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Solution

The fourth proportional to 672,686.40, 1,009,418.40 and 252,004.80 is: 378,152.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,686.40 : 1,009,418.40 = 252,004.80 : x
  2. Step 2: Convert to fraction form
    672,686.40/1,009,418.40 = 252,004.80/x
  3. Step 3: Cross multiply
    672,686.40x = 1,009,418.40 × 252,004.80
  4. Step 4: Simplify right side
    672,686.40x = 254,378,282,008.32
  5. Step 5: Solve for x
    x = 254,378,282,008.32/672,686.40
  6. Step 6: Final answer
    x = 378,152.85

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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.