Home / 859,547.70-1,289,321.55-260,479.19

Finding the Fourth Proportional to 859,547.70, 1,289,321.55 and 260,479.19

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Solution

The fourth proportional to 859,547.70, 1,289,321.55 and 260,479.19 is: 390,718.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,547.70 : 1,289,321.55 = 260,479.19 : x
  2. Step 2: Convert to fraction form
    859,547.70/1,289,321.55 = 260,479.19/x
  3. Step 3: Cross multiply
    859,547.70x = 1,289,321.55 × 260,479.19
  4. Step 4: Simplify right side
    859,547.70x = 335,841,436,216.85
  5. Step 5: Solve for x
    x = 335,841,436,216.85/859,547.70
  6. Step 6: Final answer
    x = 390,718.79

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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.