Home / 319,281.41-478,508.38-129,520.89

Finding the Fourth Proportional to 319,281.41, 478,508.38 and 129,520.89

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Solution

The fourth proportional to 319,281.41, 478,508.38 and 129,520.89 is: 194,113.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,281.41 : 478,508.38 = 129,520.89 : x
  2. Step 2: Convert to fraction form
    319,281.41/478,508.38 = 129,520.89/x
  3. Step 3: Cross multiply
    319,281.41x = 478,508.38 × 129,520.89
  4. Step 4: Simplify right side
    319,281.41x = 61,976,830,926.26
  5. Step 5: Solve for x
    x = 61,976,830,926.26/319,281.41
  6. Step 6: Final answer
    x = 194,113.50

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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.