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Finding the Fourth Proportional to 644,969.06, 890,455.65 and 415,607.30

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Solution

The fourth proportional to 644,969.06, 890,455.65 and 415,607.30 is: 573,794.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,969.06 : 890,455.65 = 415,607.30 : x
  2. Step 2: Convert to fraction form
    644,969.06/890,455.65 = 415,607.30/x
  3. Step 3: Cross multiply
    644,969.06x = 890,455.65 × 415,607.30
  4. Step 4: Simplify right side
    644,969.06x = 370,079,868,466.25
  5. Step 5: Solve for x
    x = 370,079,868,466.25/644,969.06
  6. Step 6: Final answer
    x = 573,794.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.