Home / 543,904.20-815,856.30-354,947.40

Finding the Fourth Proportional to 543,904.20, 815,856.30 and 354,947.40

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Solution

The fourth proportional to 543,904.20, 815,856.30 and 354,947.40 is: 532,421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,904.20 : 815,856.30 = 354,947.40 : x
  2. Step 2: Convert to fraction form
    543,904.20/815,856.30 = 354,947.40/x
  3. Step 3: Cross multiply
    543,904.20x = 815,856.30 × 354,947.40
  4. Step 4: Simplify right side
    543,904.20x = 289,586,072,458.62
  5. Step 5: Solve for x
    x = 289,586,072,458.62/543,904.20
  6. Step 6: Final answer
    x = 532,421.10

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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.