Home / 390,172.13-538,481.30-220,417.19

Finding the Fourth Proportional to 390,172.13, 538,481.30 and 220,417.19

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Solution

The fourth proportional to 390,172.13, 538,481.30 and 220,417.19 is: 304,200.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,172.13 : 538,481.30 = 220,417.19 : x
  2. Step 2: Convert to fraction form
    390,172.13/538,481.30 = 220,417.19/x
  3. Step 3: Cross multiply
    390,172.13x = 538,481.30 × 220,417.19
  4. Step 4: Simplify right side
    390,172.13x = 118,690,531,219.06
  5. Step 5: Solve for x
    x = 118,690,531,219.06/390,172.13
  6. Step 6: Final answer
    x = 304,200.44

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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.