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Finding the Fourth Proportional to 388,840.80, 583,261.20 and 310,108.80

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Solution

The fourth proportional to 388,840.80, 583,261.20 and 310,108.80 is: 465,163.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,840.80 : 583,261.20 = 310,108.80 : x
  2. Step 2: Convert to fraction form
    388,840.80/583,261.20 = 310,108.80/x
  3. Step 3: Cross multiply
    388,840.80x = 583,261.20 × 310,108.80
  4. Step 4: Simplify right side
    388,840.80x = 180,874,430,818.56
  5. Step 5: Solve for x
    x = 180,874,430,818.56/388,840.80
  6. Step 6: Final answer
    x = 465,163.20

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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.