Home / 711,429.34-981,780.21-389,132.35

Finding the Fourth Proportional to 711,429.34, 981,780.21 and 389,132.35

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Solution

The fourth proportional to 711,429.34, 981,780.21 and 389,132.35 is: 537,006.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,429.34 : 981,780.21 = 389,132.35 : x
  2. Step 2: Convert to fraction form
    711,429.34/981,780.21 = 389,132.35/x
  3. Step 3: Cross multiply
    711,429.34x = 981,780.21 × 389,132.35
  4. Step 4: Simplify right side
    711,429.34x = 382,042,440,300.79
  5. Step 5: Solve for x
    x = 382,042,440,300.79/711,429.34
  6. Step 6: Final answer
    x = 537,006.87

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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.