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Finding the Fourth Proportional to 421,668.30, 632,502.45 and 403,005.90

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Solution

The fourth proportional to 421,668.30, 632,502.45 and 403,005.90 is: 604,508.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,668.30 : 632,502.45 = 403,005.90 : x
  2. Step 2: Convert to fraction form
    421,668.30/632,502.45 = 403,005.90/x
  3. Step 3: Cross multiply
    421,668.30x = 632,502.45 × 403,005.90
  4. Step 4: Simplify right side
    421,668.30x = 254,902,219,114.46
  5. Step 5: Solve for x
    x = 254,902,219,114.46/421,668.30
  6. Step 6: Final answer
    x = 604,508.85

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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.