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Finding the Fourth Proportional to 424,986.80, 638,430.60 and 355,002.80

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Solution

The fourth proportional to 424,986.80, 638,430.60 and 355,002.80 is: 533,298.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,986.80 : 638,430.60 = 355,002.80 : x
  2. Step 2: Convert to fraction form
    424,986.80/638,430.60 = 355,002.80/x
  3. Step 3: Cross multiply
    424,986.80x = 638,430.60 × 355,002.80
  4. Step 4: Simplify right side
    424,986.80x = 226,644,650,605.68
  5. Step 5: Solve for x
    x = 226,644,650,605.68/424,986.80
  6. Step 6: Final answer
    x = 533,298.09

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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.