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Finding the Fourth Proportional to 253,798.15, 380,683.20 and 85,301.08

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Solution

The fourth proportional to 253,798.15, 380,683.20 and 85,301.08 is: 127,946.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,798.15 : 380,683.20 = 85,301.08 : x
  2. Step 2: Convert to fraction form
    253,798.15/380,683.20 = 85,301.08/x
  3. Step 3: Cross multiply
    253,798.15x = 380,683.20 × 85,301.08
  4. Step 4: Simplify right side
    253,798.15x = 32,472,688,097.86
  5. Step 5: Solve for x
    x = 32,472,688,097.86/253,798.15
  6. Step 6: Final answer
    x = 127,946.91

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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.