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Finding the Fourth Proportional to 421,664.80, 632,497.20 and 403,002.40

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Solution

The fourth proportional to 421,664.80, 632,497.20 and 403,002.40 is: 604,503.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,664.80 : 632,497.20 = 403,002.40 : x
  2. Step 2: Convert to fraction form
    421,664.80/632,497.20 = 403,002.40/x
  3. Step 3: Cross multiply
    421,664.80x = 632,497.20 × 403,002.40
  4. Step 4: Simplify right side
    421,664.80x = 254,897,889,593.28
  5. Step 5: Solve for x
    x = 254,897,889,593.28/421,664.80
  6. Step 6: Final answer
    x = 604,503.60

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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.