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Finding the Fourth Proportional to 385,339.80, 578,009.70 and 236,040.60

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Solution

The fourth proportional to 385,339.80, 578,009.70 and 236,040.60 is: 354,060.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,339.80 : 578,009.70 = 236,040.60 : x
  2. Step 2: Convert to fraction form
    385,339.80/578,009.70 = 236,040.60/x
  3. Step 3: Cross multiply
    385,339.80x = 578,009.70 × 236,040.60
  4. Step 4: Simplify right side
    385,339.80x = 136,433,756,393.82
  5. Step 5: Solve for x
    x = 136,433,756,393.82/385,339.80
  6. Step 6: Final answer
    x = 354,060.90

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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.