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Finding the Fourth Proportional to 615,781.40, 922,116.90 and 404,274.20

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Solution

The fourth proportional to 615,781.40, 922,116.90 and 404,274.20 is: 605,390.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,781.40 : 922,116.90 = 404,274.20 : x
  2. Step 2: Convert to fraction form
    615,781.40/922,116.90 = 404,274.20/x
  3. Step 3: Cross multiply
    615,781.40x = 922,116.90 × 404,274.20
  4. Step 4: Simplify right side
    615,781.40x = 372,788,072,053.98
  5. Step 5: Solve for x
    x = 372,788,072,053.98/615,781.40
  6. Step 6: Final answer
    x = 605,390.28

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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.