Home / 721,821.02-996,008.72-399,530.34

Finding the Fourth Proportional to 721,821.02, 996,008.72 and 399,530.34

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Solution

The fourth proportional to 721,821.02, 996,008.72 and 399,530.34 is: 551,294.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,821.02 : 996,008.72 = 399,530.34 : x
  2. Step 2: Convert to fraction form
    721,821.02/996,008.72 = 399,530.34/x
  3. Step 3: Cross multiply
    721,821.02x = 996,008.72 × 399,530.34
  4. Step 4: Simplify right side
    721,821.02x = 397,935,700,546.91
  5. Step 5: Solve for x
    x = 397,935,700,546.91/721,821.02
  6. Step 6: Final answer
    x = 551,294.15

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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.