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Finding the Fourth Proportional to 520,769.32, 780,444.57 and 318,436.28

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Solution

The fourth proportional to 520,769.32, 780,444.57 and 318,436.28 is: 477,220.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,769.32 : 780,444.57 = 318,436.28 : x
  2. Step 2: Convert to fraction form
    520,769.32/780,444.57 = 318,436.28/x
  3. Step 3: Cross multiply
    520,769.32x = 780,444.57 × 318,436.28
  4. Step 4: Simplify right side
    520,769.32x = 248,521,867,568.11
  5. Step 5: Solve for x
    x = 248,521,867,568.11/520,769.32
  6. Step 6: Final answer
    x = 477,220.64

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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.