Home / 638,648,939.18-881,333,883.21-356,388,410.62

Finding the Fourth Proportional to 638,648,939.18, 881,333,883.21 and 356,388,410.62

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Solution

The fourth proportional to 638,648,939.18, 881,333,883.21 and 356,388,410.62 is: 491,815,084.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,648,939.18 : 881,333,883.21 = 356,388,410.62 : x
  2. Step 2: Convert to fraction form
    638,648,939.18/881,333,883.21 = 356,388,410.62/x
  3. Step 3: Cross multiply
    638,648,939.18x = 881,333,883.21 × 356,388,410.62
  4. Step 4: Simplify right side
    638,648,939.18x = 314,097,181,860,982,656
  5. Step 5: Solve for x
    x = 314,097,181,860,982,656/638,648,939.18
  6. Step 6: Final answer
    x = 491,815,084.30

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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.