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Finding the Fourth Proportional to 409,643.60, 614,465.40 and 407,019.20

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Solution

The fourth proportional to 409,643.60, 614,465.40 and 407,019.20 is: 610,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,643.60 : 614,465.40 = 407,019.20 : x
  2. Step 2: Convert to fraction form
    409,643.60/614,465.40 = 407,019.20/x
  3. Step 3: Cross multiply
    409,643.60x = 614,465.40 × 407,019.20
  4. Step 4: Simplify right side
    409,643.60x = 250,099,215,535.68
  5. Step 5: Solve for x
    x = 250,099,215,535.68/409,643.60
  6. Step 6: Final answer
    x = 610,528.80

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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.