Home / 990,197.10-1,485,295.65-421,431.30

Finding the Fourth Proportional to 990,197.10, 1,485,295.65 and 421,431.30

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Solution

The fourth proportional to 990,197.10, 1,485,295.65 and 421,431.30 is: 632,146.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,197.10 : 1,485,295.65 = 421,431.30 : x
  2. Step 2: Convert to fraction form
    990,197.10/1,485,295.65 = 421,431.30/x
  3. Step 3: Cross multiply
    990,197.10x = 1,485,295.65 × 421,431.30
  4. Step 4: Simplify right side
    990,197.10x = 625,950,076,663.85
  5. Step 5: Solve for x
    x = 625,950,076,663.85/990,197.10
  6. Step 6: Final answer
    x = 632,146.95

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Similar ratio
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1.5x scale

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.