Home / 426,643.20-639,381.60-284,083.20

Finding the Fourth Proportional to 426,643.20, 639,381.60 and 284,083.20

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Solution

The fourth proportional to 426,643.20, 639,381.60 and 284,083.20 is: 425,736.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,643.20 : 639,381.60 = 284,083.20 : x
  2. Step 2: Convert to fraction form
    426,643.20/639,381.60 = 284,083.20/x
  3. Step 3: Cross multiply
    426,643.20x = 639,381.60 × 284,083.20
  4. Step 4: Simplify right side
    426,643.20x = 181,637,570,949.12
  5. Step 5: Solve for x
    x = 181,637,570,949.12/426,643.20
  6. Step 6: Final answer
    x = 425,736.47

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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.