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Finding the Fourth Proportional to 518,397.81, 715,302.41 and 288,905.01

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Solution

The fourth proportional to 518,397.81, 715,302.41 and 288,905.01 is: 398,640.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,397.81 : 715,302.41 = 288,905.01 : x
  2. Step 2: Convert to fraction form
    518,397.81/715,302.41 = 288,905.01/x
  3. Step 3: Cross multiply
    518,397.81x = 715,302.41 × 288,905.01
  4. Step 4: Simplify right side
    518,397.81x = 206,654,448,469.55
  5. Step 5: Solve for x
    x = 206,654,448,469.55/518,397.81
  6. Step 6: Final answer
    x = 398,640.67

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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.