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Finding the Fourth Proportional to 386,675.80, 580,013.70 and 307,360.60

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Solution

The fourth proportional to 386,675.80, 580,013.70 and 307,360.60 is: 461,040.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,675.80 : 580,013.70 = 307,360.60 : x
  2. Step 2: Convert to fraction form
    386,675.80/580,013.70 = 307,360.60/x
  3. Step 3: Cross multiply
    386,675.80x = 580,013.70 × 307,360.60
  4. Step 4: Simplify right side
    386,675.80x = 178,273,358,840.22
  5. Step 5: Solve for x
    x = 178,273,358,840.22/386,675.80
  6. Step 6: Final answer
    x = 461,040.90

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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.