Home / 390,239.10-585,067.05-212,946.30

Finding the Fourth Proportional to 390,239.10, 585,067.05 and 212,946.30

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Solution

The fourth proportional to 390,239.10, 585,067.05 and 212,946.30 is: 319,260.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,239.10 : 585,067.05 = 212,946.30 : x
  2. Step 2: Convert to fraction form
    390,239.10/585,067.05 = 212,946.30/x
  3. Step 3: Cross multiply
    390,239.10x = 585,067.05 × 212,946.30
  4. Step 4: Simplify right side
    390,239.10x = 124,587,863,549.42
  5. Step 5: Solve for x
    x = 124,587,863,549.42/390,239.10
  6. Step 6: Final answer
    x = 319,260.33

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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.