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Finding the Fourth Proportional to 409,627.40, 614,441.10 and 390,273.80

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Solution

The fourth proportional to 409,627.40, 614,441.10 and 390,273.80 is: 585,410.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,627.40 : 614,441.10 = 390,273.80 : x
  2. Step 2: Convert to fraction form
    409,627.40/614,441.10 = 390,273.80/x
  3. Step 3: Cross multiply
    409,627.40x = 614,441.10 × 390,273.80
  4. Step 4: Simplify right side
    409,627.40x = 239,800,262,973.18
  5. Step 5: Solve for x
    x = 239,800,262,973.18/409,627.40
  6. Step 6: Final answer
    x = 585,410.70

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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.