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Finding the Fourth Proportional to 256,885.80, 385,328.70 and 67,345.80

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Solution

The fourth proportional to 256,885.80, 385,328.70 and 67,345.80 is: 101,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,885.80 : 385,328.70 = 67,345.80 : x
  2. Step 2: Convert to fraction form
    256,885.80/385,328.70 = 67,345.80/x
  3. Step 3: Cross multiply
    256,885.80x = 385,328.70 × 67,345.80
  4. Step 4: Simplify right side
    256,885.80x = 25,950,269,564.46
  5. Step 5: Solve for x
    x = 25,950,269,564.46/256,885.80
  6. Step 6: Final answer
    x = 101,018.70

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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.