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Finding the Fourth Proportional to 355,381.47, 490,379.05 and 228,229.29

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Solution

The fourth proportional to 355,381.47, 490,379.05 and 228,229.29 is: 314,925.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,381.47 : 490,379.05 = 228,229.29 : x
  2. Step 2: Convert to fraction form
    355,381.47/490,379.05 = 228,229.29/x
  3. Step 3: Cross multiply
    355,381.47x = 490,379.05 × 228,229.29
  4. Step 4: Simplify right side
    355,381.47x = 111,918,862,412.38
  5. Step 5: Solve for x
    x = 111,918,862,412.38/355,381.47
  6. Step 6: Final answer
    x = 314,925.99

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1.5x scale

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.