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Finding the Fourth Proportional to 520,083.70, 780,125.55 and 268,141.30

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Solution

The fourth proportional to 520,083.70, 780,125.55 and 268,141.30 is: 402,211.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,083.70 : 780,125.55 = 268,141.30 : x
  2. Step 2: Convert to fraction form
    520,083.70/780,125.55 = 268,141.30/x
  3. Step 3: Cross multiply
    520,083.70x = 780,125.55 × 268,141.30
  4. Step 4: Simplify right side
    520,083.70x = 209,183,879,140.22
  5. Step 5: Solve for x
    x = 209,183,879,140.22/520,083.70
  6. Step 6: Final answer
    x = 402,211.95

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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.