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Finding the Fourth Proportional to 660,614.72, 911,653.12 and 358,808.64

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Solution

The fourth proportional to 660,614.72, 911,653.12 and 358,808.64 is: 495,158.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,614.72 : 911,653.12 = 358,808.64 : x
  2. Step 2: Convert to fraction form
    660,614.72/911,653.12 = 358,808.64/x
  3. Step 3: Cross multiply
    660,614.72x = 911,653.12 × 358,808.64
  4. Step 4: Simplify right side
    660,614.72x = 327,109,016,138.96
  5. Step 5: Solve for x
    x = 327,109,016,138.96/660,614.72
  6. Step 6: Final answer
    x = 495,158.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.