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Finding the Fourth Proportional to 711,064.49, 981,262.28 and 388,771.16

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Solution

The fourth proportional to 711,064.49, 981,262.28 and 388,771.16 is: 536,500.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,064.49 : 981,262.28 = 388,771.16 : x
  2. Step 2: Convert to fraction form
    711,064.49/981,262.28 = 388,771.16/x
  3. Step 3: Cross multiply
    711,064.49x = 981,262.28 × 388,771.16
  4. Step 4: Simplify right side
    711,064.49x = 381,486,470,925.46
  5. Step 5: Solve for x
    x = 381,486,470,925.46/711,064.49
  6. Step 6: Final answer
    x = 536,500.53

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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.