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Finding the Fourth Proportional to 388,889.60, 583,237.20 and 148,951.40

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Solution

The fourth proportional to 388,889.60, 583,237.20 and 148,951.40 is: 223,389.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,889.60 : 583,237.20 = 148,951.40 : x
  2. Step 2: Convert to fraction form
    388,889.60/583,237.20 = 148,951.40/x
  3. Step 3: Cross multiply
    388,889.60x = 583,237.20 × 148,951.40
  4. Step 4: Simplify right side
    388,889.60x = 86,873,997,472.08
  5. Step 5: Solve for x
    x = 86,873,997,472.08/388,889.60
  6. Step 6: Final answer
    x = 223,389.87

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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.