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Finding the Fourth Proportional to 385,040.72, 577,349.67 and 118,727.30

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Solution

The fourth proportional to 385,040.72, 577,349.67 and 118,727.30 is: 178,025.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,040.72 : 577,349.67 = 118,727.30 : x
  2. Step 2: Convert to fraction form
    385,040.72/577,349.67 = 118,727.30/x
  3. Step 3: Cross multiply
    385,040.72x = 577,349.67 × 118,727.30
  4. Step 4: Simplify right side
    385,040.72x = 68,547,167,474.99
  5. Step 5: Solve for x
    x = 68,547,167,474.99/385,040.72
  6. Step 6: Final answer
    x = 178,025.76

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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.