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Finding the Fourth Proportional to 425,663.24, 638,476.38 and 105,808.32

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Solution

The fourth proportional to 425,663.24, 638,476.38 and 105,808.32 is: 158,707.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,663.24 : 638,476.38 = 105,808.32 : x
  2. Step 2: Convert to fraction form
    425,663.24/638,476.38 = 105,808.32/x
  3. Step 3: Cross multiply
    425,663.24x = 638,476.38 × 105,808.32
  4. Step 4: Simplify right side
    425,663.24x = 67,556,113,127.48
  5. Step 5: Solve for x
    x = 67,556,113,127.48/425,663.24
  6. Step 6: Final answer
    x = 158,707.89

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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.