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Finding the Fourth Proportional to 405,420.60, 607,926.90 and 124,901.40

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Solution

The fourth proportional to 405,420.60, 607,926.90 and 124,901.40 is: 187,289.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,420.60 : 607,926.90 = 124,901.40 : x
  2. Step 2: Convert to fraction form
    405,420.60/607,926.90 = 124,901.40/x
  3. Step 3: Cross multiply
    405,420.60x = 607,926.90 × 124,901.40
  4. Step 4: Simplify right side
    405,420.60x = 75,930,920,907.66
  5. Step 5: Solve for x
    x = 75,930,920,907.66/405,420.60
  6. Step 6: Final answer
    x = 187,289.25

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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.