Home / 763,305.60-1,143,979.20-426,345.60

Finding the Fourth Proportional to 763,305.60, 1,143,979.20 and 426,345.60

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Solution

The fourth proportional to 763,305.60, 1,143,979.20 and 426,345.60 is: 638,971.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,305.60 : 1,143,979.20 = 426,345.60 : x
  2. Step 2: Convert to fraction form
    763,305.60/1,143,979.20 = 426,345.60/x
  3. Step 3: Cross multiply
    763,305.60x = 1,143,979.20 × 426,345.60
  4. Step 4: Simplify right side
    763,305.60x = 487,730,498,411.52
  5. Step 5: Solve for x
    x = 487,730,498,411.52/763,305.60
  6. Step 6: Final answer
    x = 638,971.47

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Double scale
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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.