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Finding the Fourth Proportional to 615,278.40, 921,362.40 and 403,771.20

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Solution

The fourth proportional to 615,278.40, 921,362.40 and 403,771.20 is: 604,636.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,278.40 : 921,362.40 = 403,771.20 : x
  2. Step 2: Convert to fraction form
    615,278.40/921,362.40 = 403,771.20/x
  3. Step 3: Cross multiply
    615,278.40x = 921,362.40 × 403,771.20
  4. Step 4: Simplify right side
    615,278.40x = 372,019,601,882.88
  5. Step 5: Solve for x
    x = 372,019,601,882.88/615,278.40
  6. Step 6: Final answer
    x = 604,636.21

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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.