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Finding the Fourth Proportional to 529,672.80, 794,509.20 and 280,840.80

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Solution

The fourth proportional to 529,672.80, 794,509.20 and 280,840.80 is: 421,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,672.80 : 794,509.20 = 280,840.80 : x
  2. Step 2: Convert to fraction form
    529,672.80/794,509.20 = 280,840.80/x
  3. Step 3: Cross multiply
    529,672.80x = 794,509.20 × 280,840.80
  4. Step 4: Simplify right side
    529,672.80x = 223,130,599,335.36
  5. Step 5: Solve for x
    x = 223,130,599,335.36/529,672.80
  6. Step 6: Final answer
    x = 421,261.20

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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.