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Finding the Fourth Proportional to 490,878.60, 735,281.10 and 407,934.60

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Solution

The fourth proportional to 490,878.60, 735,281.10 and 407,934.60 is: 611,040.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,878.60 : 735,281.10 = 407,934.60 : x
  2. Step 2: Convert to fraction form
    490,878.60/735,281.10 = 407,934.60/x
  3. Step 3: Cross multiply
    490,878.60x = 735,281.10 × 407,934.60
  4. Step 4: Simplify right side
    490,878.60x = 299,946,601,416.06
  5. Step 5: Solve for x
    x = 299,946,601,416.06/490,878.60
  6. Step 6: Final answer
    x = 611,040.29

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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.