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Finding the Fourth Proportional to 605,215.80, 907,823.70 and 393,708.60

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Solution

The fourth proportional to 605,215.80, 907,823.70 and 393,708.60 is: 590,562.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,215.80 : 907,823.70 = 393,708.60 : x
  2. Step 2: Convert to fraction form
    605,215.80/907,823.70 = 393,708.60/x
  3. Step 3: Cross multiply
    605,215.80x = 907,823.70 × 393,708.60
  4. Step 4: Simplify right side
    605,215.80x = 357,417,997,973.82
  5. Step 5: Solve for x
    x = 357,417,997,973.82/605,215.80
  6. Step 6: Final answer
    x = 590,562.90

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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.