Home / 386,899.28-533,652.36-315,279.44

Finding the Fourth Proportional to 386,899.28, 533,652.36 and 315,279.44

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Solution

The fourth proportional to 386,899.28, 533,652.36 and 315,279.44 is: 434,866.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,899.28 : 533,652.36 = 315,279.44 : x
  2. Step 2: Convert to fraction form
    386,899.28/533,652.36 = 315,279.44/x
  3. Step 3: Cross multiply
    386,899.28x = 533,652.36 × 315,279.44
  4. Step 4: Simplify right side
    386,899.28x = 168,249,617,215.48
  5. Step 5: Solve for x
    x = 168,249,617,215.48/386,899.28
  6. Step 6: Final answer
    x = 434,866.71

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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.