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Finding the Fourth Proportional to 423,010.80, 634,602.60 and 142,556.40

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Solution

The fourth proportional to 423,010.80, 634,602.60 and 142,556.40 is: 213,863.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,010.80 : 634,602.60 = 142,556.40 : x
  2. Step 2: Convert to fraction form
    423,010.80/634,602.60 = 142,556.40/x
  3. Step 3: Cross multiply
    423,010.80x = 634,602.60 × 142,556.40
  4. Step 4: Simplify right side
    423,010.80x = 90,466,662,086.64
  5. Step 5: Solve for x
    x = 90,466,662,086.64/423,010.80
  6. Step 6: Final answer
    x = 213,863.72

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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.