Home / 828,003.20-1,242,004.80-429,422.45

Finding the Fourth Proportional to 828,003.20, 1,242,004.80 and 429,422.45

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Solution

The fourth proportional to 828,003.20, 1,242,004.80 and 429,422.45 is: 644,133.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,003.20 : 1,242,004.80 = 429,422.45 : x
  2. Step 2: Convert to fraction form
    828,003.20/1,242,004.80 = 429,422.45/x
  3. Step 3: Cross multiply
    828,003.20x = 1,242,004.80 × 429,422.45
  4. Step 4: Simplify right side
    828,003.20x = 533,344,744,127.76
  5. Step 5: Solve for x
    x = 533,344,744,127.76/828,003.20
  6. Step 6: Final answer
    x = 644,133.68

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Double scale
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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.