Home / 711,403.46-981,744.40-389,106.66

Finding the Fourth Proportional to 711,403.46, 981,744.40 and 389,106.66

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Solution

The fourth proportional to 711,403.46, 981,744.40 and 389,106.66 is: 536,971.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,403.46 : 981,744.40 = 389,106.66 : x
  2. Step 2: Convert to fraction form
    711,403.46/981,744.40 = 389,106.66/x
  3. Step 3: Cross multiply
    711,403.46x = 981,744.40 × 389,106.66
  4. Step 4: Simplify right side
    711,403.46x = 382,003,284,457.70
  5. Step 5: Solve for x
    x = 382,003,284,457.70/711,403.46
  6. Step 6: Final answer
    x = 536,971.36

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Double scale
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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.