Home / 426,347,999.20-639,521,998.80-400,519,966.60

Finding the Fourth Proportional to 426,347,999.20, 639,521,998.80 and 400,519,966.60

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Solution

The fourth proportional to 426,347,999.20, 639,521,998.80 and 400,519,966.60 is: 600,779,949.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,347,999.20 : 639,521,998.80 = 400,519,966.60 : x
  2. Step 2: Convert to fraction form
    426,347,999.20/639,521,998.80 = 400,519,966.60/x
  3. Step 3: Cross multiply
    426,347,999.20x = 639,521,998.80 × 400,519,966.60
  4. Step 4: Simplify right side
    426,347,999.20x = 256,141,329,599,341,248
  5. Step 5: Solve for x
    x = 256,141,329,599,341,248/426,347,999.20
  6. Step 6: Final answer
    x = 600,779,949.90

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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.