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Finding the Fourth Proportional to 878,609.60, 1,212,542.88 and 496,639.52

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Solution

The fourth proportional to 878,609.60, 1,212,542.88 and 496,639.52 is: 685,397.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,609.60 : 1,212,542.88 = 496,639.52 : x
  2. Step 2: Convert to fraction form
    878,609.60/1,212,542.88 = 496,639.52/x
  3. Step 3: Cross multiply
    878,609.60x = 1,212,542.88 × 496,639.52
  4. Step 4: Simplify right side
    878,609.60x = 602,196,713,902.62
  5. Step 5: Solve for x
    x = 602,196,713,902.62/878,609.60
  6. Step 6: Final answer
    x = 685,397.38

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1.5x scale

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.