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Finding the Fourth Proportional to 654,089,983.72, 981,396,715.74 and 265,942,649.32

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Solution

The fourth proportional to 654,089,983.72, 981,396,715.74 and 265,942,649.32 is: 399,020,393.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,089,983.72 : 981,396,715.74 = 265,942,649.32 : x
  2. Step 2: Convert to fraction form
    654,089,983.72/981,396,715.74 = 265,942,649.32/x
  3. Step 3: Cross multiply
    654,089,983.72x = 981,396,715.74 × 265,942,649.32
  4. Step 4: Simplify right side
    654,089,983.72x = 260,995,242,617,842,528
  5. Step 5: Solve for x
    x = 260,995,242,617,842,528/654,089,983.72
  6. Step 6: Final answer
    x = 399,020,393.39

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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.