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Finding the Fourth Proportional to 711,221.04, 981,502.08 and 405,290.84

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Solution

The fourth proportional to 711,221.04, 981,502.08 and 405,290.84 is: 559,311.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,221.04 : 981,502.08 = 405,290.84 : x
  2. Step 2: Convert to fraction form
    711,221.04/981,502.08 = 405,290.84/x
  3. Step 3: Cross multiply
    711,221.04x = 981,502.08 × 405,290.84
  4. Step 4: Simplify right side
    711,221.04x = 397,793,802,464.95
  5. Step 5: Solve for x
    x = 397,793,802,464.95/711,221.04
  6. Step 6: Final answer
    x = 559,311.07

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Double scale
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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.