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Finding the Fourth Proportional to 415,698.40, 624,008.40 and 258,104.80

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Solution

The fourth proportional to 415,698.40, 624,008.40 and 258,104.80 is: 387,443.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,698.40 : 624,008.40 = 258,104.80 : x
  2. Step 2: Convert to fraction form
    415,698.40/624,008.40 = 258,104.80/x
  3. Step 3: Cross multiply
    415,698.40x = 624,008.40 × 258,104.80
  4. Step 4: Simplify right side
    415,698.40x = 161,059,563,280.32
  5. Step 5: Solve for x
    x = 161,059,563,280.32/415,698.40
  6. Step 6: Final answer
    x = 387,443.31

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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.