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Finding the Fourth Proportional to 388,994.55, 583,158.96 and 149,280.45

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Solution

The fourth proportional to 388,994.55, 583,158.96 and 149,280.45 is: 223,792.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,994.55 : 583,158.96 = 149,280.45 : x
  2. Step 2: Convert to fraction form
    388,994.55/583,158.96 = 149,280.45/x
  3. Step 3: Cross multiply
    388,994.55x = 583,158.96 × 149,280.45
  4. Step 4: Simplify right side
    388,994.55x = 87,054,231,970.33
  5. Step 5: Solve for x
    x = 87,054,231,970.33/388,994.55
  6. Step 6: Final answer
    x = 223,792.93

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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.