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Finding the Fourth Proportional to 673,995,985.70, 1,010,993,978.55 and 265,065,476.90

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Solution

The fourth proportional to 673,995,985.70, 1,010,993,978.55 and 265,065,476.90 is: 397,598,215.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,995,985.70 : 1,010,993,978.55 = 265,065,476.90 : x
  2. Step 2: Convert to fraction form
    673,995,985.70/1,010,993,978.55 = 265,065,476.90/x
  3. Step 3: Cross multiply
    673,995,985.70x = 1,010,993,978.55 × 265,065,476.90
  4. Step 4: Simplify right side
    673,995,985.70x = 267,979,601,067,384,128
  5. Step 5: Solve for x
    x = 267,979,601,067,384,128/673,995,985.70
  6. Step 6: Final answer
    x = 397,598,215.35

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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.