Home / 642,565.98-886,718.75-356,112.72

Finding the Fourth Proportional to 642,565.98, 886,718.75 and 356,112.72

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Solution

The fourth proportional to 642,565.98, 886,718.75 and 356,112.72 is: 491,423.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,565.98 : 886,718.75 = 356,112.72 : x
  2. Step 2: Convert to fraction form
    642,565.98/886,718.75 = 356,112.72/x
  3. Step 3: Cross multiply
    642,565.98x = 886,718.75 × 356,112.72
  4. Step 4: Simplify right side
    642,565.98x = 315,771,824,156.94
  5. Step 5: Solve for x
    x = 315,771,824,156.94/642,565.98
  6. Step 6: Final answer
    x = 491,423.19

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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.