Home / 423,005.28-634,511.16-142,518.48

Finding the Fourth Proportional to 423,005.28, 634,511.16 and 142,518.48

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Solution

The fourth proportional to 423,005.28, 634,511.16 and 142,518.48 is: 213,778.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,005.28 : 634,511.16 = 142,518.48 : x
  2. Step 2: Convert to fraction form
    423,005.28/634,511.16 = 142,518.48/x
  3. Step 3: Cross multiply
    423,005.28x = 634,511.16 × 142,518.48
  4. Step 4: Simplify right side
    423,005.28x = 90,429,566,066.24
  5. Step 5: Solve for x
    x = 90,429,566,066.24/423,005.28
  6. Step 6: Final answer
    x = 213,778.81

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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.