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Finding the Fourth Proportional to 256,482.72, 386,474.76 and 210,759.84

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Solution

The fourth proportional to 256,482.72, 386,474.76 and 210,759.84 is: 317,578.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,482.72 : 386,474.76 = 210,759.84 : x
  2. Step 2: Convert to fraction form
    256,482.72/386,474.76 = 210,759.84/x
  3. Step 3: Cross multiply
    256,482.72x = 386,474.76 × 210,759.84
  4. Step 4: Simplify right side
    256,482.72x = 81,453,358,581.64
  5. Step 5: Solve for x
    x = 81,453,358,581.64/256,482.72
  6. Step 6: Final answer
    x = 317,578.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.