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Finding the Fourth Proportional to 319,080.70, 478,183.65 and 260,031.70

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Solution

The fourth proportional to 319,080.70, 478,183.65 and 260,031.70 is: 389,691.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,080.70 : 478,183.65 = 260,031.70 : x
  2. Step 2: Convert to fraction form
    319,080.70/478,183.65 = 260,031.70/x
  3. Step 3: Cross multiply
    319,080.70x = 478,183.65 × 260,031.70
  4. Step 4: Simplify right side
    319,080.70x = 124,342,907,421.71
  5. Step 5: Solve for x
    x = 124,342,907,421.71/319,080.70
  6. Step 6: Final answer
    x = 389,691.10

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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.