Home / 639,215.04-958,128.96-315,227.52

Finding the Fourth Proportional to 639,215.04, 958,128.96 and 315,227.52

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Solution

The fourth proportional to 639,215.04, 958,128.96 and 315,227.52 is: 472,499.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,215.04 : 958,128.96 = 315,227.52 : x
  2. Step 2: Convert to fraction form
    639,215.04/958,128.96 = 315,227.52/x
  3. Step 3: Cross multiply
    639,215.04x = 958,128.96 × 315,227.52
  4. Step 4: Simplify right side
    639,215.04x = 302,028,615,900.98
  5. Step 5: Solve for x
    x = 302,028,615,900.98/639,215.04
  6. Step 6: Final answer
    x = 472,499.23

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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.