Home / 642,340.90-886,437.57-355,865.50

Finding the Fourth Proportional to 642,340.90, 886,437.57 and 355,865.50

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Solution

The fourth proportional to 642,340.90, 886,437.57 and 355,865.50 is: 491,098.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,340.90 : 886,437.57 = 355,865.50 : x
  2. Step 2: Convert to fraction form
    642,340.90/886,437.57 = 355,865.50/x
  3. Step 3: Cross multiply
    642,340.90x = 886,437.57 × 355,865.50
  4. Step 4: Simplify right side
    642,340.90x = 315,452,549,066.84
  5. Step 5: Solve for x
    x = 315,452,549,066.84/642,340.90
  6. Step 6: Final answer
    x = 491,098.34

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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.