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Finding the Fourth Proportional to 518,958.80, 779,021.40 and 401,152.40

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Solution

The fourth proportional to 518,958.80, 779,021.40 and 401,152.40 is: 602,179.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,958.80 : 779,021.40 = 401,152.40 : x
  2. Step 2: Convert to fraction form
    518,958.80/779,021.40 = 401,152.40/x
  3. Step 3: Cross multiply
    518,958.80x = 779,021.40 × 401,152.40
  4. Step 4: Simplify right side
    518,958.80x = 312,506,304,261.36
  5. Step 5: Solve for x
    x = 312,506,304,261.36/518,958.80
  6. Step 6: Final answer
    x = 602,179.41

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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.