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Finding the Fourth Proportional to 421,663.80, 632,495.70 and 403,001.40

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Solution

The fourth proportional to 421,663.80, 632,495.70 and 403,001.40 is: 604,502.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,663.80 : 632,495.70 = 403,001.40 : x
  2. Step 2: Convert to fraction form
    421,663.80/632,495.70 = 403,001.40/x
  3. Step 3: Cross multiply
    421,663.80x = 632,495.70 × 403,001.40
  4. Step 4: Simplify right side
    421,663.80x = 254,896,652,593.98
  5. Step 5: Solve for x
    x = 254,896,652,593.98/421,663.80
  6. Step 6: Final answer
    x = 604,502.10

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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.