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Finding the Fourth Proportional to 804,978.10, 1,207,467.15 and 431,730.10

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Solution

The fourth proportional to 804,978.10, 1,207,467.15 and 431,730.10 is: 647,595.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    804,978.10 : 1,207,467.15 = 431,730.10 : x
  2. Step 2: Convert to fraction form
    804,978.10/1,207,467.15 = 431,730.10/x
  3. Step 3: Cross multiply
    804,978.10x = 1,207,467.15 × 431,730.10
  4. Step 4: Simplify right side
    804,978.10x = 521,299,913,416.22
  5. Step 5: Solve for x
    x = 521,299,913,416.22/804,978.10
  6. Step 6: Final answer
    x = 647,595.15

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Similar ratio
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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.