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Finding the Fourth Proportional to 519,990.80, 779,986.20 and 348,748.70

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Solution

The fourth proportional to 519,990.80, 779,986.20 and 348,748.70 is: 523,123.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,990.80 : 779,986.20 = 348,748.70 : x
  2. Step 2: Convert to fraction form
    519,990.80/779,986.20 = 348,748.70/x
  3. Step 3: Cross multiply
    519,990.80x = 779,986.20 × 348,748.70
  4. Step 4: Simplify right side
    519,990.80x = 272,019,173,267.94
  5. Step 5: Solve for x
    x = 272,019,173,267.94/519,990.80
  6. Step 6: Final answer
    x = 523,123.05

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Double scale
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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.