Home / 487,219.20-730,828.80-319,257.60

Finding the Fourth Proportional to 487,219.20, 730,828.80 and 319,257.60

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Solution

The fourth proportional to 487,219.20, 730,828.80 and 319,257.60 is: 478,886.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,219.20 : 730,828.80 = 319,257.60 : x
  2. Step 2: Convert to fraction form
    487,219.20/730,828.80 = 319,257.60/x
  3. Step 3: Cross multiply
    487,219.20x = 730,828.80 × 319,257.60
  4. Step 4: Simplify right side
    487,219.20x = 233,322,648,698.88
  5. Step 5: Solve for x
    x = 233,322,648,698.88/487,219.20
  6. Step 6: Final answer
    x = 478,886.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.