Home / 427,103,998.40-640,655,997.60-386,289,329.60

Finding the Fourth Proportional to 427,103,998.40, 640,655,997.60 and 386,289,329.60

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Solution

The fourth proportional to 427,103,998.40, 640,655,997.60 and 386,289,329.60 is: 579,433,994.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,103,998.40 : 640,655,997.60 = 386,289,329.60 : x
  2. Step 2: Convert to fraction form
    427,103,998.40/640,655,997.60 = 386,289,329.60/x
  3. Step 3: Cross multiply
    427,103,998.40x = 640,655,997.60 × 386,289,329.60
  4. Step 4: Simplify right side
    427,103,998.40x = 247,478,575,817,123,232
  5. Step 5: Solve for x
    x = 247,478,575,817,123,232/427,103,998.40
  6. Step 6: Final answer
    x = 579,433,994.40

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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.