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Finding the Fourth Proportional to 423,037.80, 634,556.70 and 404,375.40

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Solution

The fourth proportional to 423,037.80, 634,556.70 and 404,375.40 is: 606,563.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,037.80 : 634,556.70 = 404,375.40 : x
  2. Step 2: Convert to fraction form
    423,037.80/634,556.70 = 404,375.40/x
  3. Step 3: Cross multiply
    423,037.80x = 634,556.70 × 404,375.40
  4. Step 4: Simplify right side
    423,037.80x = 256,599,119,385.18
  5. Step 5: Solve for x
    x = 256,599,119,385.18/423,037.80
  6. Step 6: Final answer
    x = 606,563.10

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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.