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Finding the Fourth Proportional to 385,113.60, 576,892.80 and 266,918.40

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Solution

The fourth proportional to 385,113.60, 576,892.80 and 266,918.40 is: 399,838.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,113.60 : 576,892.80 = 266,918.40 : x
  2. Step 2: Convert to fraction form
    385,113.60/576,892.80 = 266,918.40/x
  3. Step 3: Cross multiply
    385,113.60x = 576,892.80 × 266,918.40
  4. Step 4: Simplify right side
    385,113.60x = 153,983,303,147.52
  5. Step 5: Solve for x
    x = 153,983,303,147.52/385,113.60
  6. Step 6: Final answer
    x = 399,838.65

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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.