Home / 1,390,861.08-2,086,617.06-431,266.20

Finding the Fourth Proportional to 1,390,861.08, 2,086,617.06 and 431,266.20

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Solution

The fourth proportional to 1,390,861.08, 2,086,617.06 and 431,266.20 is: 647,000.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,861.08 : 2,086,617.06 = 431,266.20 : x
  2. Step 2: Convert to fraction form
    1,390,861.08/2,086,617.06 = 431,266.20/x
  3. Step 3: Cross multiply
    1,390,861.08x = 2,086,617.06 × 431,266.20
  4. Step 4: Simplify right side
    1,390,861.08x = 899,887,410,321.37
  5. Step 5: Solve for x
    x = 899,887,410,321.37/1,390,861.08
  6. Step 6: Final answer
    x = 647,000.21

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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.