Home / 390,998.12-539,531.25-225,424.23

Finding the Fourth Proportional to 390,998.12, 539,531.25 and 225,424.23

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Solution

The fourth proportional to 390,998.12, 539,531.25 and 225,424.23 is: 311,058.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,998.12 : 539,531.25 = 225,424.23 : x
  2. Step 2: Convert to fraction form
    390,998.12/539,531.25 = 225,424.23/x
  3. Step 3: Cross multiply
    390,998.12x = 539,531.25 × 225,424.23
  4. Step 4: Simplify right side
    390,998.12x = 121,623,416,592.19
  5. Step 5: Solve for x
    x = 121,623,416,592.19/390,998.12
  6. Step 6: Final answer
    x = 311,058.83

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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.