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Finding the Fourth Proportional to 642,470.15, 886,595.58 and 355,987.73

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Solution

The fourth proportional to 642,470.15, 886,595.58 and 355,987.73 is: 491,255.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,470.15 : 886,595.58 = 355,987.73 : x
  2. Step 2: Convert to fraction form
    642,470.15/886,595.58 = 355,987.73/x
  3. Step 3: Cross multiply
    642,470.15x = 886,595.58 × 355,987.73
  4. Step 4: Simplify right side
    642,470.15x = 315,617,150,168.72
  5. Step 5: Solve for x
    x = 315,617,150,168.72/642,470.15
  6. Step 6: Final answer
    x = 491,255.74

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1.5x scale

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.