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Finding the Fourth Proportional to 711,054, 981,235.66 and 420,680.55

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Solution

The fourth proportional to 711,054, 981,235.66 and 420,680.55 is: 580,528.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,054 : 981,235.66 = 420,680.55 : x
  2. Step 2: Convert to fraction form
    711,054/981,235.66 = 420,680.55/x
  3. Step 3: Cross multiply
    711,054x = 981,235.66 × 420,680.55
  4. Step 4: Simplify right side
    711,054x = 412,786,757,128.41
  5. Step 5: Solve for x
    x = 412,786,757,128.41/711,054
  6. Step 6: Final answer
    x = 580,528.00

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1.5x scale

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.