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Finding the Fourth Proportional to 303,497.28, 455,129.28 and 209,718.72

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Solution

The fourth proportional to 303,497.28, 455,129.28 and 209,718.72 is: 314,497.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,497.28 : 455,129.28 = 209,718.72 : x
  2. Step 2: Convert to fraction form
    303,497.28/455,129.28 = 209,718.72/x
  3. Step 3: Cross multiply
    303,497.28x = 455,129.28 × 209,718.72
  4. Step 4: Simplify right side
    303,497.28x = 95,449,130,036.12
  5. Step 5: Solve for x
    x = 95,449,130,036.12/303,497.28
  6. Step 6: Final answer
    x = 314,497.48

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1.5x scale

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.