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Finding the Fourth Proportional to 608,436.80, 912,655.20 and 396,929.60

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Solution

The fourth proportional to 608,436.80, 912,655.20 and 396,929.60 is: 595,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,436.80 : 912,655.20 = 396,929.60 : x
  2. Step 2: Convert to fraction form
    608,436.80/912,655.20 = 396,929.60/x
  3. Step 3: Cross multiply
    608,436.80x = 912,655.20 × 396,929.60
  4. Step 4: Simplify right side
    608,436.80x = 362,259,863,473.92
  5. Step 5: Solve for x
    x = 362,259,863,473.92/608,436.80
  6. Step 6: Final answer
    x = 595,394.40

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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.