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Finding the Fourth Proportional to 390,530.80, 585,623.40 and 180,233.20

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Solution

The fourth proportional to 390,530.80, 585,623.40 and 180,233.20 is: 270,270.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,530.80 : 585,623.40 = 180,233.20 : x
  2. Step 2: Convert to fraction form
    390,530.80/585,623.40 = 180,233.20/x
  3. Step 3: Cross multiply
    390,530.80x = 585,623.40 × 180,233.20
  4. Step 4: Simplify right side
    390,530.80x = 105,548,779,376.88
  5. Step 5: Solve for x
    x = 105,548,779,376.88/390,530.80
  6. Step 6: Final answer
    x = 270,270.05

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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.