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Finding the Fourth Proportional to 615,655.40, 921,927.90 and 404,148.20

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Solution

The fourth proportional to 615,655.40, 921,927.90 and 404,148.20 is: 605,201.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,655.40 : 921,927.90 = 404,148.20 : x
  2. Step 2: Convert to fraction form
    615,655.40/921,927.90 = 404,148.20/x
  3. Step 3: Cross multiply
    615,655.40x = 921,927.90 × 404,148.20
  4. Step 4: Simplify right side
    615,655.40x = 372,595,501,314.78
  5. Step 5: Solve for x
    x = 372,595,501,314.78/615,655.40
  6. Step 6: Final answer
    x = 605,201.39

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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.