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Finding the Fourth Proportional to 613,631.80, 919,583.70 and 487,487.80

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Solution

The fourth proportional to 613,631.80, 919,583.70 and 487,487.80 is: 730,545.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,631.80 : 919,583.70 = 487,487.80 : x
  2. Step 2: Convert to fraction form
    613,631.80/919,583.70 = 487,487.80/x
  3. Step 3: Cross multiply
    613,631.80x = 919,583.70 × 487,487.80
  4. Step 4: Simplify right side
    613,631.80x = 448,285,834,828.86
  5. Step 5: Solve for x
    x = 448,285,834,828.86/613,631.80
  6. Step 6: Final answer
    x = 730,545.31

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1.5x scale

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.