Home / 390,109.80-585,190.23-120,204.84

Finding the Fourth Proportional to 390,109.80, 585,190.23 and 120,204.84

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Solution

The fourth proportional to 390,109.80, 585,190.23 and 120,204.84 is: 180,315.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,109.80 : 585,190.23 = 120,204.84 : x
  2. Step 2: Convert to fraction form
    390,109.80/585,190.23 = 120,204.84/x
  3. Step 3: Cross multiply
    390,109.80x = 585,190.23 × 120,204.84
  4. Step 4: Simplify right side
    390,109.80x = 70,342,697,966.71
  5. Step 5: Solve for x
    x = 70,342,697,966.71/390,109.80
  6. Step 6: Final answer
    x = 180,315.13

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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.