Home / 420,735,280.80-630,804,322.80-190,814,512.80

Finding the Fourth Proportional to 420,735,280.80, 630,804,322.80 and 190,814,512.80

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Solution

The fourth proportional to 420,735,280.80, 630,804,322.80 and 190,814,512.80 is: 286,086,346.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,735,280.80 : 630,804,322.80 = 190,814,512.80 : x
  2. Step 2: Convert to fraction form
    420,735,280.80/630,804,322.80 = 190,814,512.80/x
  3. Step 3: Cross multiply
    420,735,280.80x = 630,804,322.80 × 190,814,512.80
  4. Step 4: Simplify right side
    420,735,280.80x = 120,366,619,527,215,936
  5. Step 5: Solve for x
    x = 120,366,619,527,215,936/420,735,280.80
  6. Step 6: Final answer
    x = 286,086,346.97

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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.