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Finding the Fourth Proportional to 390,072.30, 585,108.45 and 277,514.70

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Solution

The fourth proportional to 390,072.30, 585,108.45 and 277,514.70 is: 416,272.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,072.30 : 585,108.45 = 277,514.70 : x
  2. Step 2: Convert to fraction form
    390,072.30/585,108.45 = 277,514.70/x
  3. Step 3: Cross multiply
    390,072.30x = 585,108.45 × 277,514.70
  4. Step 4: Simplify right side
    390,072.30x = 162,376,195,969.22
  5. Step 5: Solve for x
    x = 162,376,195,969.22/390,072.30
  6. Step 6: Final answer
    x = 416,272.05

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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.