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Finding the Fourth Proportional to 2,791,978.20, 4,187,967.30 and 1,835,384.40

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Solution

The fourth proportional to 2,791,978.20, 4,187,967.30 and 1,835,384.40 is: 2,753,076.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791,978.20 : 4,187,967.30 = 1,835,384.40 : x
  2. Step 2: Convert to fraction form
    2,791,978.20/4,187,967.30 = 1,835,384.40/x
  3. Step 3: Cross multiply
    2,791,978.20x = 4,187,967.30 × 1,835,384.40
  4. Step 4: Simplify right side
    2,791,978.20x = 7,686,529,850,130.12
  5. Step 5: Solve for x
    x = 7,686,529,850,130.12/2,791,978.20
  6. Step 6: Final answer
    x = 2,753,076.60

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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.