Home / 345,335.38-518,356.56-285,172.17

Finding the Fourth Proportional to 345,335.38, 518,356.56 and 285,172.17

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Solution

The fourth proportional to 345,335.38, 518,356.56 and 285,172.17 is: 428,050.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,335.38 : 518,356.56 = 285,172.17 : x
  2. Step 2: Convert to fraction form
    345,335.38/518,356.56 = 285,172.17/x
  3. Step 3: Cross multiply
    345,335.38x = 518,356.56 × 285,172.17
  4. Step 4: Simplify right side
    345,335.38x = 147,820,866,141.99
  5. Step 5: Solve for x
    x = 147,820,866,141.99/345,335.38
  6. Step 6: Final answer
    x = 428,050.17

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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.