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Finding the Fourth Proportional to 256,989.60, 385,484.40 and 90,794.40

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Solution

The fourth proportional to 256,989.60, 385,484.40 and 90,794.40 is: 136,191.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,989.60 : 385,484.40 = 90,794.40 : x
  2. Step 2: Convert to fraction form
    256,989.60/385,484.40 = 90,794.40/x
  3. Step 3: Cross multiply
    256,989.60x = 385,484.40 × 90,794.40
  4. Step 4: Simplify right side
    256,989.60x = 34,999,824,807.36
  5. Step 5: Solve for x
    x = 34,999,824,807.36/256,989.60
  6. Step 6: Final answer
    x = 136,191.60

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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.