Home / 728,415.82-1,005,287.34-422,585.74

Finding the Fourth Proportional to 728,415.82, 1,005,287.34 and 422,585.74

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Solution

The fourth proportional to 728,415.82, 1,005,287.34 and 422,585.74 is: 583,210.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,415.82 : 1,005,287.34 = 422,585.74 : x
  2. Step 2: Convert to fraction form
    728,415.82/1,005,287.34 = 422,585.74/x
  3. Step 3: Cross multiply
    728,415.82x = 1,005,287.34 × 422,585.74
  4. Step 4: Simplify right side
    728,415.82x = 424,820,094,486.53
  5. Step 5: Solve for x
    x = 424,820,094,486.53/728,415.82
  6. Step 6: Final answer
    x = 583,210.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.