Home / 389,417.18-584,122.92-209,587.05

Finding the Fourth Proportional to 389,417.18, 584,122.92 and 209,587.05

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Solution

The fourth proportional to 389,417.18, 584,122.92 and 209,587.05 is: 314,379.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,417.18 : 584,122.92 = 209,587.05 : x
  2. Step 2: Convert to fraction form
    389,417.18/584,122.92 = 209,587.05/x
  3. Step 3: Cross multiply
    389,417.18x = 584,122.92 × 209,587.05
  4. Step 4: Simplify right side
    389,417.18x = 122,424,599,640.19
  5. Step 5: Solve for x
    x = 122,424,599,640.19/389,417.18
  6. Step 6: Final answer
    x = 314,379.05

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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.