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Finding the Fourth Proportional to 228,690.56, 315,593.88 and 128,088.56

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Solution

The fourth proportional to 228,690.56, 315,593.88 and 128,088.56 is: 176,762.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,690.56 : 315,593.88 = 128,088.56 : x
  2. Step 2: Convert to fraction form
    228,690.56/315,593.88 = 128,088.56/x
  3. Step 3: Cross multiply
    228,690.56x = 315,593.88 × 128,088.56
  4. Step 4: Simplify right side
    228,690.56x = 40,423,965,634.01
  5. Step 5: Solve for x
    x = 40,423,965,634.01/228,690.56
  6. Step 6: Final answer
    x = 176,762.72

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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.