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Finding the Fourth Proportional to 388,876.30, 583,314.46 and 122,657.57

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Solution

The fourth proportional to 388,876.30, 583,314.46 and 122,657.57 is: 183,986.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,876.30 : 583,314.46 = 122,657.57 : x
  2. Step 2: Convert to fraction form
    388,876.30/583,314.46 = 122,657.57/x
  3. Step 3: Cross multiply
    388,876.30x = 583,314.46 × 122,657.57
  4. Step 4: Simplify right side
    388,876.30x = 71,547,933,596.17
  5. Step 5: Solve for x
    x = 71,547,933,596.17/388,876.30
  6. Step 6: Final answer
    x = 183,986.36

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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.