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Finding the Fourth Proportional to 654,363.90, 903,006.63 and 428,004.54

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Solution

The fourth proportional to 654,363.90, 903,006.63 and 428,004.54 is: 590,636.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,363.90 : 903,006.63 = 428,004.54 : x
  2. Step 2: Convert to fraction form
    654,363.90/903,006.63 = 428,004.54/x
  3. Step 3: Cross multiply
    654,363.90x = 903,006.63 × 428,004.54
  4. Step 4: Simplify right side
    654,363.90x = 386,490,937,290.10
  5. Step 5: Solve for x
    x = 386,490,937,290.10/654,363.90
  6. Step 6: Final answer
    x = 590,636.09

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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.