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Finding the Fourth Proportional to 511,985.20, 766,228.20 and 448,999.60

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Solution

The fourth proportional to 511,985.20, 766,228.20 and 448,999.60 is: 671,965.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,985.20 : 766,228.20 = 448,999.60 : x
  2. Step 2: Convert to fraction form
    511,985.20/766,228.20 = 448,999.60/x
  3. Step 3: Cross multiply
    511,985.20x = 766,228.20 × 448,999.60
  4. Step 4: Simplify right side
    511,985.20x = 344,036,155,308.72
  5. Step 5: Solve for x
    x = 344,036,155,308.72/511,985.20
  6. Step 6: Final answer
    x = 671,965.04

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Similar ratio
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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.