Home / 828,007.20-1,242,010.80-429,426.45

Finding the Fourth Proportional to 828,007.20, 1,242,010.80 and 429,426.45

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Solution

The fourth proportional to 828,007.20, 1,242,010.80 and 429,426.45 is: 644,139.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,007.20 : 1,242,010.80 = 429,426.45 : x
  2. Step 2: Convert to fraction form
    828,007.20/1,242,010.80 = 429,426.45/x
  3. Step 3: Cross multiply
    828,007.20x = 1,242,010.80 × 429,426.45
  4. Step 4: Simplify right side
    828,007.20x = 533,352,288,705.66
  5. Step 5: Solve for x
    x = 533,352,288,705.66/828,007.20
  6. Step 6: Final answer
    x = 644,139.68

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Similar ratio
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1.5x scale

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.