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Finding the Fourth Proportional to 605,219.80, 907,829.70 and 487,121.80

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Solution

The fourth proportional to 605,219.80, 907,829.70 and 487,121.80 is: 730,682.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,219.80 : 907,829.70 = 487,121.80 : x
  2. Step 2: Convert to fraction form
    605,219.80/907,829.70 = 487,121.80/x
  3. Step 3: Cross multiply
    605,219.80x = 907,829.70 × 487,121.80
  4. Step 4: Simplify right side
    605,219.80x = 442,223,637,557.46
  5. Step 5: Solve for x
    x = 442,223,637,557.46/605,219.80
  6. Step 6: Final answer
    x = 730,682.70

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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.