Home / 386,212.79-579,479.06-208,510.81

Finding the Fourth Proportional to 386,212.79, 579,479.06 and 208,510.81

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Solution

The fourth proportional to 386,212.79, 579,479.06 and 208,510.81 is: 312,852.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,212.79 : 579,479.06 = 208,510.81 : x
  2. Step 2: Convert to fraction form
    386,212.79/579,479.06 = 208,510.81/x
  3. Step 3: Cross multiply
    386,212.79x = 579,479.06 × 208,510.81
  4. Step 4: Simplify right side
    386,212.79x = 120,827,647,251.22
  5. Step 5: Solve for x
    x = 120,827,647,251.22/386,212.79
  6. Step 6: Final answer
    x = 312,852.52

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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.