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Finding the Fourth Proportional to 641,325.72, 884,643.96 and 423,536.40

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Solution

The fourth proportional to 641,325.72, 884,643.96 and 423,536.40 is: 584,225.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,325.72 : 884,643.96 = 423,536.40 : x
  2. Step 2: Convert to fraction form
    641,325.72/884,643.96 = 423,536.40/x
  3. Step 3: Cross multiply
    641,325.72x = 884,643.96 × 423,536.40
  4. Step 4: Simplify right side
    641,325.72x = 374,678,918,100.14
  5. Step 5: Solve for x
    x = 374,678,918,100.14/641,325.72
  6. Step 6: Final answer
    x = 584,225.62

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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.