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Finding the Fourth Proportional to 346,720.80, 518,929.20 and 251,680.80

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Solution

The fourth proportional to 346,720.80, 518,929.20 and 251,680.80 is: 376,684.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,720.80 : 518,929.20 = 251,680.80 : x
  2. Step 2: Convert to fraction form
    346,720.80/518,929.20 = 251,680.80/x
  3. Step 3: Cross multiply
    346,720.80x = 518,929.20 × 251,680.80
  4. Step 4: Simplify right side
    346,720.80x = 130,604,516,199.36
  5. Step 5: Solve for x
    x = 130,604,516,199.36/346,720.80
  6. Step 6: Final answer
    x = 376,684.98

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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.