Home / 321,128.15-442,443.06-212,038.16

Finding the Fourth Proportional to 321,128.15, 442,443.06 and 212,038.16

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Solution

The fourth proportional to 321,128.15, 442,443.06 and 212,038.16 is: 292,141.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,128.15 : 442,443.06 = 212,038.16 : x
  2. Step 2: Convert to fraction form
    321,128.15/442,443.06 = 212,038.16/x
  3. Step 3: Cross multiply
    321,128.15x = 442,443.06 × 212,038.16
  4. Step 4: Simplify right side
    321,128.15x = 93,814,810,134.95
  5. Step 5: Solve for x
    x = 93,814,810,134.95/321,128.15
  6. Step 6: Final answer
    x = 292,141.35

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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.