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Finding the Fourth Proportional to 835,978.20, 1,254,356.10 and 437,069.40

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Solution

The fourth proportional to 835,978.20, 1,254,356.10 and 437,069.40 is: 655,807.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    835,978.20 : 1,254,356.10 = 437,069.40 : x
  2. Step 2: Convert to fraction form
    835,978.20/1,254,356.10 = 437,069.40/x
  3. Step 3: Cross multiply
    835,978.20x = 1,254,356.10 × 437,069.40
  4. Step 4: Simplify right side
    835,978.20x = 548,240,668,013.34
  5. Step 5: Solve for x
    x = 548,240,668,013.34/835,978.20
  6. Step 6: Final answer
    x = 655,807.37

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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.