Home / 491,943.95-678,930.93-287,982.50

Finding the Fourth Proportional to 491,943.95, 678,930.93 and 287,982.50

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Solution

The fourth proportional to 491,943.95, 678,930.93 and 287,982.50 is: 397,444.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,943.95 : 678,930.93 = 287,982.50 : x
  2. Step 2: Convert to fraction form
    491,943.95/678,930.93 = 287,982.50/x
  3. Step 3: Cross multiply
    491,943.95x = 678,930.93 × 287,982.50
  4. Step 4: Simplify right side
    491,943.95x = 195,520,223,154.07
  5. Step 5: Solve for x
    x = 195,520,223,154.07/491,943.95
  6. Step 6: Final answer
    x = 397,444.11

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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.