Home / 420,544.68-630,900-154,307.40

Finding the Fourth Proportional to 420,544.68, 630,900 and 154,307.40

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Solution

The fourth proportional to 420,544.68, 630,900 and 154,307.40 is: 231,491.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,544.68 : 630,900 = 154,307.40 : x
  2. Step 2: Convert to fraction form
    420,544.68/630,900 = 154,307.40/x
  3. Step 3: Cross multiply
    420,544.68x = 630,900 × 154,307.40
  4. Step 4: Simplify right side
    420,544.68x = 97,352,538,660
  5. Step 5: Solve for x
    x = 97,352,538,660/420,544.68
  6. Step 6: Final answer
    x = 231,491.55

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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.