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Finding the Fourth Proportional to 492,116.90, 738,175.35 and 421,258.10

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Solution

The fourth proportional to 492,116.90, 738,175.35 and 421,258.10 is: 631,887.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,116.90 : 738,175.35 = 421,258.10 : x
  2. Step 2: Convert to fraction form
    492,116.90/738,175.35 = 421,258.10/x
  3. Step 3: Cross multiply
    492,116.90x = 738,175.35 × 421,258.10
  4. Step 4: Simplify right side
    492,116.90x = 310,962,345,407.84
  5. Step 5: Solve for x
    x = 310,962,345,407.84/492,116.90
  6. Step 6: Final answer
    x = 631,887.15

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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.