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Finding the Fourth Proportional to 253,699.08, 380,569.74 and 85,211.40

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Solution

The fourth proportional to 253,699.08, 380,569.74 and 85,211.40 is: 127,824.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,699.08 : 380,569.74 = 85,211.40 : x
  2. Step 2: Convert to fraction form
    253,699.08/380,569.74 = 85,211.40/x
  3. Step 3: Cross multiply
    253,699.08x = 380,569.74 × 85,211.40
  4. Step 4: Simplify right side
    253,699.08x = 32,428,880,343.04
  5. Step 5: Solve for x
    x = 32,428,880,343.04/253,699.08
  6. Step 6: Final answer
    x = 127,824.19

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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.