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Finding the Fourth Proportional to 379,886.80, 569,830.20 and 319,061.20

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Solution

The fourth proportional to 379,886.80, 569,830.20 and 319,061.20 is: 478,591.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,886.80 : 569,830.20 = 319,061.20 : x
  2. Step 2: Convert to fraction form
    379,886.80/569,830.20 = 319,061.20/x
  3. Step 3: Cross multiply
    379,886.80x = 569,830.20 × 319,061.20
  4. Step 4: Simplify right side
    379,886.80x = 181,810,707,408.24
  5. Step 5: Solve for x
    x = 181,810,707,408.24/379,886.80
  6. Step 6: Final answer
    x = 478,591.80

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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.