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Finding the Fourth Proportional to 915,672.80, 1,373,509.20 and 864,063.20

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Solution

The fourth proportional to 915,672.80, 1,373,509.20 and 864,063.20 is: 1,296,094.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,672.80 : 1,373,509.20 = 864,063.20 : x
  2. Step 2: Convert to fraction form
    915,672.80/1,373,509.20 = 864,063.20/x
  3. Step 3: Cross multiply
    915,672.80x = 1,373,509.20 × 864,063.20
  4. Step 4: Simplify right side
    915,672.80x = 1,186,798,754,581.44
  5. Step 5: Solve for x
    x = 1,186,798,754,581.44/915,672.80
  6. Step 6: Final answer
    x = 1,296,094.80

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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.