Home / 426,285.40-639,428.10-299,104.60

Finding the Fourth Proportional to 426,285.40, 639,428.10 and 299,104.60

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Solution

The fourth proportional to 426,285.40, 639,428.10 and 299,104.60 is: 448,656.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,285.40 : 639,428.10 = 299,104.60 : x
  2. Step 2: Convert to fraction form
    426,285.40/639,428.10 = 299,104.60/x
  3. Step 3: Cross multiply
    426,285.40x = 639,428.10 × 299,104.60
  4. Step 4: Simplify right side
    426,285.40x = 191,255,886,079.26
  5. Step 5: Solve for x
    x = 191,255,886,079.26/426,285.40
  6. Step 6: Final answer
    x = 448,656.90

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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.