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Finding the Fourth Proportional to 461,486.40, 691,840.80 and 239,870.40

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Solution

The fourth proportional to 461,486.40, 691,840.80 and 239,870.40 is: 359,603.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,486.40 : 691,840.80 = 239,870.40 : x
  2. Step 2: Convert to fraction form
    461,486.40/691,840.80 = 239,870.40/x
  3. Step 3: Cross multiply
    461,486.40x = 691,840.80 × 239,870.40
  4. Step 4: Simplify right side
    461,486.40x = 165,952,129,432.32
  5. Step 5: Solve for x
    x = 165,952,129,432.32/461,486.40
  6. Step 6: Final answer
    x = 359,603.51

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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.