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Finding the Fourth Proportional to 519,807.20, 780,148.20 and 204,490.40

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Solution

The fourth proportional to 519,807.20, 780,148.20 and 204,490.40 is: 306,907.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,807.20 : 780,148.20 = 204,490.40 : x
  2. Step 2: Convert to fraction form
    519,807.20/780,148.20 = 204,490.40/x
  3. Step 3: Cross multiply
    519,807.20x = 780,148.20 × 204,490.40
  4. Step 4: Simplify right side
    519,807.20x = 159,532,817,477.28
  5. Step 5: Solve for x
    x = 159,532,817,477.28/519,807.20
  6. Step 6: Final answer
    x = 306,907.67

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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.