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Finding the Fourth Proportional to 256,684.72, 385,092.68 and 98,870.80

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Solution

The fourth proportional to 256,684.72, 385,092.68 and 98,870.80 is: 148,331.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,684.72 : 385,092.68 = 98,870.80 : x
  2. Step 2: Convert to fraction form
    256,684.72/385,092.68 = 98,870.80/x
  3. Step 3: Cross multiply
    256,684.72x = 385,092.68 × 98,870.80
  4. Step 4: Simplify right side
    256,684.72x = 38,074,421,345.74
  5. Step 5: Solve for x
    x = 38,074,421,345.74/256,684.72
  6. Step 6: Final answer
    x = 148,331.47

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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.