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Finding the Fourth Proportional to 400,862.88, 551,931.84 and 340,308

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Solution

The fourth proportional to 400,862.88, 551,931.84 and 340,308 is: 468,556.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,862.88 : 551,931.84 = 340,308 : x
  2. Step 2: Convert to fraction form
    400,862.88/551,931.84 = 340,308/x
  3. Step 3: Cross multiply
    400,862.88x = 551,931.84 × 340,308
  4. Step 4: Simplify right side
    400,862.88x = 187,826,820,606.72
  5. Step 5: Solve for x
    x = 187,826,820,606.72/400,862.88
  6. Step 6: Final answer
    x = 468,556.28

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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.