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Finding the Fourth Proportional to 405,079.40, 607,619.10 and 124,596.20

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Solution

The fourth proportional to 405,079.40, 607,619.10 and 124,596.20 is: 186,894.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,079.40 : 607,619.10 = 124,596.20 : x
  2. Step 2: Convert to fraction form
    405,079.40/607,619.10 = 124,596.20/x
  3. Step 3: Cross multiply
    405,079.40x = 607,619.10 × 124,596.20
  4. Step 4: Simplify right side
    405,079.40x = 75,707,030,907.42
  5. Step 5: Solve for x
    x = 75,707,030,907.42/405,079.40
  6. Step 6: Final answer
    x = 186,894.30

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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.