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Finding the Fourth Proportional to 520,082.70, 780,124.05 and 268,140.30

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Solution

The fourth proportional to 520,082.70, 780,124.05 and 268,140.30 is: 402,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,082.70 : 780,124.05 = 268,140.30 : x
  2. Step 2: Convert to fraction form
    520,082.70/780,124.05 = 268,140.30/x
  3. Step 3: Cross multiply
    520,082.70x = 780,124.05 × 268,140.30
  4. Step 4: Simplify right side
    520,082.70x = 209,182,696,804.22
  5. Step 5: Solve for x
    x = 209,182,696,804.22/520,082.70
  6. Step 6: Final answer
    x = 402,210.45

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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.