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Finding the Fourth Proportional to 565,080.40, 779,807.20 and 306,955

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Solution

The fourth proportional to 565,080.40, 779,807.20 and 306,955 is: 423,595.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,080.40 : 779,807.20 = 306,955 : x
  2. Step 2: Convert to fraction form
    565,080.40/779,807.20 = 306,955/x
  3. Step 3: Cross multiply
    565,080.40x = 779,807.20 × 306,955
  4. Step 4: Simplify right side
    565,080.40x = 239,365,719,076
  5. Step 5: Solve for x
    x = 239,365,719,076/565,080.40
  6. Step 6: Final answer
    x = 423,595.86

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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.