Home / 711,482.10-981,832.40-389,189.38

Finding the Fourth Proportional to 711,482.10, 981,832.40 and 389,189.38

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Solution

The fourth proportional to 711,482.10, 981,832.40 and 389,189.38 is: 537,074.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,482.10 : 981,832.40 = 389,189.38 : x
  2. Step 2: Convert to fraction form
    711,482.10/981,832.40 = 389,189.38/x
  3. Step 3: Cross multiply
    711,482.10x = 981,832.40 × 389,189.38
  4. Step 4: Simplify right side
    711,482.10x = 382,118,743,019.91
  5. Step 5: Solve for x
    x = 382,118,743,019.91/711,482.10
  6. Step 6: Final answer
    x = 537,074.29

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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.