Home / 859,904.20-1,289,856.30-260,836.30

Finding the Fourth Proportional to 859,904.20, 1,289,856.30 and 260,836.30

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Solution

The fourth proportional to 859,904.20, 1,289,856.30 and 260,836.30 is: 391,254.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,904.20 : 1,289,856.30 = 260,836.30 : x
  2. Step 2: Convert to fraction form
    859,904.20/1,289,856.30 = 260,836.30/x
  3. Step 3: Cross multiply
    859,904.20x = 1,289,856.30 × 260,836.30
  4. Step 4: Simplify right side
    859,904.20x = 336,441,344,823.69
  5. Step 5: Solve for x
    x = 336,441,344,823.69/859,904.20
  6. Step 6: Final answer
    x = 391,254.45

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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.