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Finding the Fourth Proportional to 388,912.60, 583,271.70 and 148,974.40

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Solution

The fourth proportional to 388,912.60, 583,271.70 and 148,974.40 is: 223,424.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,912.60 : 583,271.70 = 148,974.40 : x
  2. Step 2: Convert to fraction form
    388,912.60/583,271.70 = 148,974.40/x
  3. Step 3: Cross multiply
    388,912.60x = 583,271.70 × 148,974.40
  4. Step 4: Simplify right side
    388,912.60x = 86,892,551,544.48
  5. Step 5: Solve for x
    x = 86,892,551,544.48/388,912.60
  6. Step 6: Final answer
    x = 223,424.37

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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.