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Finding the Fourth Proportional to 316,390.65, 436,626.62 and 180,437.61

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Solution

The fourth proportional to 316,390.65, 436,626.62 and 180,437.61 is: 249,008.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,390.65 : 436,626.62 = 180,437.61 : x
  2. Step 2: Convert to fraction form
    316,390.65/436,626.62 = 180,437.61/x
  3. Step 3: Cross multiply
    316,390.65x = 436,626.62 × 180,437.61
  4. Step 4: Simplify right side
    316,390.65x = 78,783,863,775.18
  5. Step 5: Solve for x
    x = 78,783,863,775.18/316,390.65
  6. Step 6: Final answer
    x = 249,008.19

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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.