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Finding the Fourth Proportional to 605,311.79, 835,130.32 and 390,594.56

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Solution

The fourth proportional to 605,311.79, 835,130.32 and 390,594.56 is: 538,891.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,311.79 : 835,130.32 = 390,594.56 : x
  2. Step 2: Convert to fraction form
    605,311.79/835,130.32 = 390,594.56/x
  3. Step 3: Cross multiply
    605,311.79x = 835,130.32 × 390,594.56
  4. Step 4: Simplify right side
    605,311.79x = 326,197,354,730.92
  5. Step 5: Solve for x
    x = 326,197,354,730.92/605,311.79
  6. Step 6: Final answer
    x = 538,891.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.