Home / 828,008.20-1,242,012.30-429,427.45

Finding the Fourth Proportional to 828,008.20, 1,242,012.30 and 429,427.45

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Solution

The fourth proportional to 828,008.20, 1,242,012.30 and 429,427.45 is: 644,141.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,008.20 : 1,242,012.30 = 429,427.45 : x
  2. Step 2: Convert to fraction form
    828,008.20/1,242,012.30 = 429,427.45/x
  3. Step 3: Cross multiply
    828,008.20x = 1,242,012.30 × 429,427.45
  4. Step 4: Simplify right side
    828,008.20x = 533,354,174,857.64
  5. Step 5: Solve for x
    x = 533,354,174,857.64/828,008.20
  6. Step 6: Final answer
    x = 644,141.18

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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.