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Finding the Fourth Proportional to 659,356.80, 909,912.88 and 357,550.72

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Solution

The fourth proportional to 659,356.80, 909,912.88 and 357,550.72 is: 493,420.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,356.80 : 909,912.88 = 357,550.72 : x
  2. Step 2: Convert to fraction form
    659,356.80/909,912.88 = 357,550.72/x
  3. Step 3: Cross multiply
    659,356.80x = 909,912.88 × 357,550.72
  4. Step 4: Simplify right side
    659,356.80x = 325,340,005,381.27
  5. Step 5: Solve for x
    x = 325,340,005,381.27/659,356.80
  6. Step 6: Final answer
    x = 493,420.26

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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.