Home / 386,386.74-579,746.97-209,018.61

Finding the Fourth Proportional to 386,386.74, 579,746.97 and 209,018.61

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Solution

The fourth proportional to 386,386.74, 579,746.97 and 209,018.61 is: 313,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,386.74 : 579,746.97 = 209,018.61 : x
  2. Step 2: Convert to fraction form
    386,386.74/579,746.97 = 209,018.61/x
  3. Step 3: Cross multiply
    386,386.74x = 579,746.97 × 209,018.61
  4. Step 4: Simplify right side
    386,386.74x = 121,177,905,821.11
  5. Step 5: Solve for x
    x = 121,177,905,821.11/386,386.74
  6. Step 6: Final answer
    x = 313,618.18

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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.