Home / 858,872,268.20-1,288,686,315.90-398,573,503.40

Finding the Fourth Proportional to 858,872,268.20, 1,288,686,315.90 and 398,573,503.40

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Solution

The fourth proportional to 858,872,268.20, 1,288,686,315.90 and 398,573,503.40 is: 598,035,631.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,872,268.20 : 1,288,686,315.90 = 398,573,503.40 : x
  2. Step 2: Convert to fraction form
    858,872,268.20/1,288,686,315.90 = 398,573,503.40/x
  3. Step 3: Cross multiply
    858,872,268.20x = 1,288,686,315.90 × 398,573,503.40
  4. Step 4: Simplify right side
    858,872,268.20x = 513,636,219,711,902,144
  5. Step 5: Solve for x
    x = 513,636,219,711,902,144/858,872,268.20
  6. Step 6: Final answer
    x = 598,035,631.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.