Home / 912,324.78-1,258,976.42-498,871.20

Finding the Fourth Proportional to 912,324.78, 1,258,976.42 and 498,871.20

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Solution

The fourth proportional to 912,324.78, 1,258,976.42 and 498,871.20 is: 688,424.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,324.78 : 1,258,976.42 = 498,871.20 : x
  2. Step 2: Convert to fraction form
    912,324.78/1,258,976.42 = 498,871.20/x
  3. Step 3: Cross multiply
    912,324.78x = 1,258,976.42 × 498,871.20
  4. Step 4: Simplify right side
    912,324.78x = 628,067,077,417.10
  5. Step 5: Solve for x
    x = 628,067,077,417.10/912,324.78
  6. Step 6: Final answer
    x = 688,424.88

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Double scale
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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.