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Finding the Fourth Proportional to 306,807.39, 423,281.84 and 185,861.43

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Solution

The fourth proportional to 306,807.39, 423,281.84 and 185,861.43 is: 256,420.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,807.39 : 423,281.84 = 185,861.43 : x
  2. Step 2: Convert to fraction form
    306,807.39/423,281.84 = 185,861.43/x
  3. Step 3: Cross multiply
    306,807.39x = 423,281.84 × 185,861.43
  4. Step 4: Simplify right side
    306,807.39x = 78,671,767,146.12
  5. Step 5: Solve for x
    x = 78,671,767,146.12/306,807.39
  6. Step 6: Final answer
    x = 256,420.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.