Home / 420,439.79-630,284.61-154,138.13

Finding the Fourth Proportional to 420,439.79, 630,284.61 and 154,138.13

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Solution

The fourth proportional to 420,439.79, 630,284.61 and 154,138.13 is: 231,069.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,439.79 : 630,284.61 = 154,138.13 : x
  2. Step 2: Convert to fraction form
    420,439.79/630,284.61 = 154,138.13/x
  3. Step 3: Cross multiply
    420,439.79x = 630,284.61 × 154,138.13
  4. Step 4: Simplify right side
    420,439.79x = 97,150,891,153.18
  5. Step 5: Solve for x
    x = 97,150,891,153.18/420,439.79
  6. Step 6: Final answer
    x = 231,069.69

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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.