Home / 208,864.47-288,382.76-128,399.87

Finding the Fourth Proportional to 208,864.47, 288,382.76 and 128,399.87

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Solution

The fourth proportional to 208,864.47, 288,382.76 and 128,399.87 is: 177,283.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,864.47 : 288,382.76 = 128,399.87 : x
  2. Step 2: Convert to fraction form
    208,864.47/288,382.76 = 128,399.87/x
  3. Step 3: Cross multiply
    208,864.47x = 288,382.76 × 128,399.87
  4. Step 4: Simplify right side
    208,864.47x = 37,028,308,252.24
  5. Step 5: Solve for x
    x = 37,028,308,252.24/208,864.47
  6. Step 6: Final answer
    x = 177,283.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.