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Finding the Fourth Proportional to 490,213.60, 735,320.40 and 265,681.60

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Solution

The fourth proportional to 490,213.60, 735,320.40 and 265,681.60 is: 398,522.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,213.60 : 735,320.40 = 265,681.60 : x
  2. Step 2: Convert to fraction form
    490,213.60/735,320.40 = 265,681.60/x
  3. Step 3: Cross multiply
    490,213.60x = 735,320.40 × 265,681.60
  4. Step 4: Simplify right side
    490,213.60x = 195,361,100,384.64
  5. Step 5: Solve for x
    x = 195,361,100,384.64/490,213.60
  6. Step 6: Final answer
    x = 398,522.40

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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.