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Finding the Fourth Proportional to 438,435.80, 657,653.70 and 225,859.40

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Solution

The fourth proportional to 438,435.80, 657,653.70 and 225,859.40 is: 338,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,435.80 : 657,653.70 = 225,859.40 : x
  2. Step 2: Convert to fraction form
    438,435.80/657,653.70 = 225,859.40/x
  3. Step 3: Cross multiply
    438,435.80x = 657,653.70 × 225,859.40
  4. Step 4: Simplify right side
    438,435.80x = 148,537,270,089.78
  5. Step 5: Solve for x
    x = 148,537,270,089.78/438,435.80
  6. Step 6: Final answer
    x = 338,789.10

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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.