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Finding the Fourth Proportional to 485,878.30, 670,542.08 and 268,085.90

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Solution

The fourth proportional to 485,878.30, 670,542.08 and 268,085.90 is: 369,975.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,878.30 : 670,542.08 = 268,085.90 : x
  2. Step 2: Convert to fraction form
    485,878.30/670,542.08 = 268,085.90/x
  3. Step 3: Cross multiply
    485,878.30x = 670,542.08 × 268,085.90
  4. Step 4: Simplify right side
    485,878.30x = 179,762,877,004.67
  5. Step 5: Solve for x
    x = 179,762,877,004.67/485,878.30
  6. Step 6: Final answer
    x = 369,975.11

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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.