Home / 478,909,404.78-660,769,907.10-280,564,274.90

Finding the Fourth Proportional to 478,909,404.78, 660,769,907.10 and 280,564,274.90

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Solution

The fourth proportional to 478,909,404.78, 660,769,907.10 and 280,564,274.90 is: 387,105,427.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,909,404.78 : 660,769,907.10 = 280,564,274.90 : x
  2. Step 2: Convert to fraction form
    478,909,404.78/660,769,907.10 = 280,564,274.90/x
  3. Step 3: Cross multiply
    478,909,404.78x = 660,769,907.10 × 280,564,274.90
  4. Step 4: Simplify right side
    478,909,404.78x = 185,388,429,861,251,840
  5. Step 5: Solve for x
    x = 185,388,429,861,251,840/478,909,404.78
  6. Step 6: Final answer
    x = 387,105,427.48

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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.