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Finding the Fourth Proportional to 538,218.40, 806,636.40 and 412,938.40

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Solution

The fourth proportional to 538,218.40, 806,636.40 and 412,938.40 is: 618,877.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,218.40 : 806,636.40 = 412,938.40 : x
  2. Step 2: Convert to fraction form
    538,218.40/806,636.40 = 412,938.40/x
  3. Step 3: Cross multiply
    538,218.40x = 806,636.40 × 412,938.40
  4. Step 4: Simplify right side
    538,218.40x = 333,091,144,397.76
  5. Step 5: Solve for x
    x = 333,091,144,397.76/538,218.40
  6. Step 6: Final answer
    x = 618,877.29

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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.