Home / 430,499.56-645,749.88-205,807.18

Finding the Fourth Proportional to 430,499.56, 645,749.88 and 205,807.18

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Solution

The fourth proportional to 430,499.56, 645,749.88 and 205,807.18 is: 308,711.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,499.56 : 645,749.88 = 205,807.18 : x
  2. Step 2: Convert to fraction form
    430,499.56/645,749.88 = 205,807.18/x
  3. Step 3: Cross multiply
    430,499.56x = 645,749.88 × 205,807.18
  4. Step 4: Simplify right side
    430,499.56x = 132,899,961,788.14
  5. Step 5: Solve for x
    x = 132,899,961,788.14/430,499.56
  6. Step 6: Final answer
    x = 308,711.03

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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.