Home / 640,014,240.78-960,014,362.77-155,340,048.78

Finding the Fourth Proportional to 640,014,240.78, 960,014,362.77 and 155,340,048.78

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Solution

The fourth proportional to 640,014,240.78, 960,014,362.77 and 155,340,048.78 is: 233,008,374.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,014,240.78 : 960,014,362.77 = 155,340,048.78 : x
  2. Step 2: Convert to fraction form
    640,014,240.78/960,014,362.77 = 155,340,048.78/x
  3. Step 3: Cross multiply
    640,014,240.78x = 960,014,362.77 × 155,340,048.78
  4. Step 4: Simplify right side
    640,014,240.78x = 149,128,677,942,192,416
  5. Step 5: Solve for x
    x = 149,128,677,942,192,416/640,014,240.78
  6. Step 6: Final answer
    x = 233,008,374.56

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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.