Home / 420,913.16-631,618.64-154,860.35

Finding the Fourth Proportional to 420,913.16, 631,618.64 and 154,860.35

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Solution

The fourth proportional to 420,913.16, 631,618.64 and 154,860.35 is: 232,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,913.16 : 631,618.64 = 154,860.35 : x
  2. Step 2: Convert to fraction form
    420,913.16/631,618.64 = 154,860.35/x
  3. Step 3: Cross multiply
    420,913.16x = 631,618.64 × 154,860.35
  4. Step 4: Simplify right side
    420,913.16x = 97,812,682,882.62
  5. Step 5: Solve for x
    x = 97,812,682,882.62/420,913.16
  6. Step 6: Final answer
    x = 232,382.10

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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.