Home / 819,345.92-1,229,018.88-258,424.16

Finding the Fourth Proportional to 819,345.92, 1,229,018.88 and 258,424.16

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Solution

The fourth proportional to 819,345.92, 1,229,018.88 and 258,424.16 is: 387,636.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,345.92 : 1,229,018.88 = 258,424.16 : x
  2. Step 2: Convert to fraction form
    819,345.92/1,229,018.88 = 258,424.16/x
  3. Step 3: Cross multiply
    819,345.92x = 1,229,018.88 × 258,424.16
  4. Step 4: Simplify right side
    819,345.92x = 317,608,171,688.14
  5. Step 5: Solve for x
    x = 317,608,171,688.14/819,345.92
  6. Step 6: Final answer
    x = 387,636.24

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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.