Home / 319,910.32-438,275.10-307,948.08

Finding the Fourth Proportional to 319,910.32, 438,275.10 and 307,948.08

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Solution

The fourth proportional to 319,910.32, 438,275.10 and 307,948.08 is: 421,886.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,910.32 : 438,275.10 = 307,948.08 : x
  2. Step 2: Convert to fraction form
    319,910.32/438,275.10 = 307,948.08/x
  3. Step 3: Cross multiply
    319,910.32x = 438,275.10 × 307,948.08
  4. Step 4: Simplify right side
    319,910.32x = 134,965,975,556.81
  5. Step 5: Solve for x
    x = 134,965,975,556.81/319,910.32
  6. Step 6: Final answer
    x = 421,886.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.