Home / 289,989,455.40-434,984,183.10-278,841,781.80

Finding the Fourth Proportional to 289,989,455.40, 434,984,183.10 and 278,841,781.80

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Solution

The fourth proportional to 289,989,455.40, 434,984,183.10 and 278,841,781.80 is: 418,262,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,989,455.40 : 434,984,183.10 = 278,841,781.80 : x
  2. Step 2: Convert to fraction form
    289,989,455.40/434,984,183.10 = 278,841,781.80/x
  3. Step 3: Cross multiply
    289,989,455.40x = 434,984,183.10 × 278,841,781.80
  4. Step 4: Simplify right side
    289,989,455.40x = 121,291,764,670,421,456
  5. Step 5: Solve for x
    x = 121,291,764,670,421,456/289,989,455.40
  6. Step 6: Final answer
    x = 418,262,672.70

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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.