Home / 286,687-430,121.22-128,929.24

Finding the Fourth Proportional to 286,687, 430,121.22 and 128,929.24

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Solution

The fourth proportional to 286,687, 430,121.22 and 128,929.24 is: 193,434.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,687 : 430,121.22 = 128,929.24 : x
  2. Step 2: Convert to fraction form
    286,687/430,121.22 = 128,929.24/x
  3. Step 3: Cross multiply
    286,687x = 430,121.22 × 128,929.24
  4. Step 4: Simplify right side
    286,687x = 55,455,202,002.47
  5. Step 5: Solve for x
    x = 55,455,202,002.47/286,687
  6. Step 6: Final answer
    x = 193,434.66

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1.5x scale

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.