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Finding the Fourth Proportional to 423,009.60, 634,514.40 and 245,425.20

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Solution

The fourth proportional to 423,009.60, 634,514.40 and 245,425.20 is: 368,137.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,009.60 : 634,514.40 = 245,425.20 : x
  2. Step 2: Convert to fraction form
    423,009.60/634,514.40 = 245,425.20/x
  3. Step 3: Cross multiply
    423,009.60x = 634,514.40 × 245,425.20
  4. Step 4: Simplify right side
    423,009.60x = 155,725,823,522.88
  5. Step 5: Solve for x
    x = 155,725,823,522.88/423,009.60
  6. Step 6: Final answer
    x = 368,137.80

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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.