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Finding the Fourth Proportional to 303,390.72, 454,821.12 and 153,434.88

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Solution

The fourth proportional to 303,390.72, 454,821.12 and 153,434.88 is: 230,018.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,390.72 : 454,821.12 = 153,434.88 : x
  2. Step 2: Convert to fraction form
    303,390.72/454,821.12 = 153,434.88/x
  3. Step 3: Cross multiply
    303,390.72x = 454,821.12 × 153,434.88
  4. Step 4: Simplify right side
    303,390.72x = 69,785,423,968.67
  5. Step 5: Solve for x
    x = 69,785,423,968.67/303,390.72
  6. Step 6: Final answer
    x = 230,018.32

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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.