Home / 386,445.49-579,835.10-209,077.36

Finding the Fourth Proportional to 386,445.49, 579,835.10 and 209,077.36

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Solution

The fourth proportional to 386,445.49, 579,835.10 and 209,077.36 is: 313,706.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,445.49 : 579,835.10 = 209,077.36 : x
  2. Step 2: Convert to fraction form
    386,445.49/579,835.10 = 209,077.36/x
  3. Step 3: Cross multiply
    386,445.49x = 579,835.10 × 209,077.36
  4. Step 4: Simplify right side
    386,445.49x = 121,230,390,897.95
  5. Step 5: Solve for x
    x = 121,230,390,897.95/386,445.49
  6. Step 6: Final answer
    x = 313,706.32

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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.