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Finding the Fourth Proportional to 519,775.80, 779,663.70 and 379,807.80

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Solution

The fourth proportional to 519,775.80, 779,663.70 and 379,807.80 is: 569,711.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,775.80 : 779,663.70 = 379,807.80 : x
  2. Step 2: Convert to fraction form
    519,775.80/779,663.70 = 379,807.80/x
  3. Step 3: Cross multiply
    519,775.80x = 779,663.70 × 379,807.80
  4. Step 4: Simplify right side
    519,775.80x = 296,122,354,636.86
  5. Step 5: Solve for x
    x = 296,122,354,636.86/519,775.80
  6. Step 6: Final answer
    x = 569,711.70

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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.