Home / 390,624.03-585,990.51-120,774.20

Finding the Fourth Proportional to 390,624.03, 585,990.51 and 120,774.20

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Solution

The fourth proportional to 390,624.03, 585,990.51 and 120,774.20 is: 181,178.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,624.03 : 585,990.51 = 120,774.20 : x
  2. Step 2: Convert to fraction form
    390,624.03/585,990.51 = 120,774.20/x
  3. Step 3: Cross multiply
    390,624.03x = 585,990.51 × 120,774.20
  4. Step 4: Simplify right side
    390,624.03x = 70,772,536,517.82
  5. Step 5: Solve for x
    x = 70,772,536,517.82/390,624.03
  6. Step 6: Final answer
    x = 181,178.14

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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.