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Finding the Fourth Proportional to 711,068.24, 981,288.34 and 388,798.40

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Solution

The fourth proportional to 711,068.24, 981,288.34 and 388,798.40 is: 536,549.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,068.24 : 981,288.34 = 388,798.40 : x
  2. Step 2: Convert to fraction form
    711,068.24/981,288.34 = 388,798.40/x
  3. Step 3: Cross multiply
    711,068.24x = 981,288.34 × 388,798.40
  4. Step 4: Simplify right side
    711,068.24x = 381,523,336,530.66
  5. Step 5: Solve for x
    x = 381,523,336,530.66/711,068.24
  6. Step 6: Final answer
    x = 536,549.54

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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.