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Finding the Fourth Proportional to 386,051.90, 579,077.85 and 260,080.70

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Solution

The fourth proportional to 386,051.90, 579,077.85 and 260,080.70 is: 390,121.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,051.90 : 579,077.85 = 260,080.70 : x
  2. Step 2: Convert to fraction form
    386,051.90/579,077.85 = 260,080.70/x
  3. Step 3: Cross multiply
    386,051.90x = 579,077.85 × 260,080.70
  4. Step 4: Simplify right side
    386,051.90x = 150,606,972,582.50
  5. Step 5: Solve for x
    x = 150,606,972,582.50/386,051.90
  6. Step 6: Final answer
    x = 390,121.05

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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.