Home / 636,971,478.35-878,567,836.40-425,171,521.43

Finding the Fourth Proportional to 636,971,478.35, 878,567,836.40 and 425,171,521.43

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Solution

The fourth proportional to 636,971,478.35, 878,567,836.40 and 425,171,521.43 is: 586,434,458.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,971,478.35 : 878,567,836.40 = 425,171,521.43 : x
  2. Step 2: Convert to fraction form
    636,971,478.35/878,567,836.40 = 425,171,521.43/x
  3. Step 3: Cross multiply
    636,971,478.35x = 878,567,836.40 × 425,171,521.43
  4. Step 4: Simplify right side
    636,971,478.35x = 373,542,023,680,021,632
  5. Step 5: Solve for x
    x = 373,542,023,680,021,632/636,971,478.35
  6. Step 6: Final answer
    x = 586,434,458.02

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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.