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Finding the Fourth Proportional to 518,403.42, 715,399.95 and 288,975.27

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Solution

The fourth proportional to 518,403.42, 715,399.95 and 288,975.27 is: 398,787.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,403.42 : 715,399.95 = 288,975.27 : x
  2. Step 2: Convert to fraction form
    518,403.42/715,399.95 = 288,975.27/x
  3. Step 3: Cross multiply
    518,403.42x = 715,399.95 × 288,975.27
  4. Step 4: Simplify right side
    518,403.42x = 206,732,893,709.24
  5. Step 5: Solve for x
    x = 206,732,893,709.24/518,403.42
  6. Step 6: Final answer
    x = 398,787.67

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1.5x scale

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.