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Finding the Fourth Proportional to 256,356.71, 384,282.34 and 90,028.07

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Solution

The fourth proportional to 256,356.71, 384,282.34 and 90,028.07 is: 134,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,356.71 : 384,282.34 = 90,028.07 : x
  2. Step 2: Convert to fraction form
    256,356.71/384,282.34 = 90,028.07/x
  3. Step 3: Cross multiply
    256,356.71x = 384,282.34 × 90,028.07
  4. Step 4: Simplify right side
    256,356.71x = 34,596,197,405.28
  5. Step 5: Solve for x
    x = 34,596,197,405.28/256,356.71
  6. Step 6: Final answer
    x = 134,953.35

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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.