Home / 721,878.02-996,191.69-399,588.12

Finding the Fourth Proportional to 721,878.02, 996,191.69 and 399,588.12

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Solution

The fourth proportional to 721,878.02, 996,191.69 and 399,588.12 is: 551,431.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,878.02 : 996,191.69 = 399,588.12 : x
  2. Step 2: Convert to fraction form
    721,878.02/996,191.69 = 399,588.12/x
  3. Step 3: Cross multiply
    721,878.02x = 996,191.69 × 399,588.12
  4. Step 4: Simplify right side
    721,878.02x = 398,066,357,899.13
  5. Step 5: Solve for x
    x = 398,066,357,899.13/721,878.02
  6. Step 6: Final answer
    x = 551,431.61

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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.