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Finding the Fourth Proportional to 490,478.40, 735,328.80 and 268,862.40

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Solution

The fourth proportional to 490,478.40, 735,328.80 and 268,862.40 is: 403,080.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,478.40 : 735,328.80 = 268,862.40 : x
  2. Step 2: Convert to fraction form
    490,478.40/735,328.80 = 268,862.40/x
  3. Step 3: Cross multiply
    490,478.40x = 735,328.80 × 268,862.40
  4. Step 4: Simplify right side
    490,478.40x = 197,702,265,957.12
  5. Step 5: Solve for x
    x = 197,702,265,957.12/490,478.40
  6. Step 6: Final answer
    x = 403,080.47

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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.