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Finding the Fourth Proportional to 256,607,999.70, 384,911,999.55 and 65,131,775.70

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Solution

The fourth proportional to 256,607,999.70, 384,911,999.55 and 65,131,775.70 is: 97,697,663.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,607,999.70 : 384,911,999.55 = 65,131,775.70 : x
  2. Step 2: Convert to fraction form
    256,607,999.70/384,911,999.55 = 65,131,775.70/x
  3. Step 3: Cross multiply
    256,607,999.70x = 384,911,999.55 × 65,131,775.70
  4. Step 4: Simplify right side
    256,607,999.70x = 25,070,002,018,929,104
  5. Step 5: Solve for x
    x = 25,070,002,018,929,104/256,607,999.70
  6. Step 6: Final answer
    x = 97,697,663.55

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1.5x scale

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.