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Finding the Fourth Proportional to 485,222.16, 669,609.24 and 281,393.93

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Solution

The fourth proportional to 485,222.16, 669,609.24 and 281,393.93 is: 388,325.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,222.16 : 669,609.24 = 281,393.93 : x
  2. Step 2: Convert to fraction form
    485,222.16/669,609.24 = 281,393.93/x
  3. Step 3: Cross multiply
    485,222.16x = 669,609.24 × 281,393.93
  4. Step 4: Simplify right side
    485,222.16x = 188,423,975,607.91
  5. Step 5: Solve for x
    x = 188,423,975,607.91/485,222.16
  6. Step 6: Final answer
    x = 388,325.17

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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.