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Finding the Fourth Proportional to 390,037.68, 584,940.60 and 165,394.80

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Solution

The fourth proportional to 390,037.68, 584,940.60 and 165,394.80 is: 248,043.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,037.68 : 584,940.60 = 165,394.80 : x
  2. Step 2: Convert to fraction form
    390,037.68/584,940.60 = 165,394.80/x
  3. Step 3: Cross multiply
    390,037.68x = 584,940.60 × 165,394.80
  4. Step 4: Simplify right side
    390,037.68x = 96,746,133,548.88
  5. Step 5: Solve for x
    x = 96,746,133,548.88/390,037.68
  6. Step 6: Final answer
    x = 248,043.04

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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.