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Finding the Fourth Proportional to 566,145.48, 781,629.84 and 389,640

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Solution

The fourth proportional to 566,145.48, 781,629.84 and 389,640 is: 537,943.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    566,145.48 : 781,629.84 = 389,640 : x
  2. Step 2: Convert to fraction form
    566,145.48/781,629.84 = 389,640/x
  3. Step 3: Cross multiply
    566,145.48x = 781,629.84 × 389,640
  4. Step 4: Simplify right side
    566,145.48x = 304,554,250,857.60
  5. Step 5: Solve for x
    x = 304,554,250,857.60/566,145.48
  6. Step 6: Final answer
    x = 537,943.45

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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.