Home / 420,235,680.60-630,447,999.30-247,623,643.80

Finding the Fourth Proportional to 420,235,680.60, 630,447,999.30 and 247,623,643.80

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Solution

The fourth proportional to 420,235,680.60, 630,447,999.30 and 247,623,643.80 is: 371,491,137.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,235,680.60 : 630,447,999.30 = 247,623,643.80 : x
  2. Step 2: Convert to fraction form
    420,235,680.60/630,447,999.30 = 247,623,643.80/x
  3. Step 3: Cross multiply
    420,235,680.60x = 630,447,999.30 × 247,623,643.80
  4. Step 4: Simplify right side
    420,235,680.60x = 156,113,830,813,085,856
  5. Step 5: Solve for x
    x = 156,113,830,813,085,856/420,235,680.60
  6. Step 6: Final answer
    x = 371,491,137.05

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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.