Home / 427,400.93-640,510.91-371,107.55

Finding the Fourth Proportional to 427,400.93, 640,510.91 and 371,107.55

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Solution

The fourth proportional to 427,400.93, 640,510.91 and 371,107.55 is: 556,148.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,400.93 : 640,510.91 = 371,107.55 : x
  2. Step 2: Convert to fraction form
    427,400.93/640,510.91 = 371,107.55/x
  3. Step 3: Cross multiply
    427,400.93x = 640,510.91 × 371,107.55
  4. Step 4: Simplify right side
    427,400.93x = 237,698,435,695.76
  5. Step 5: Solve for x
    x = 237,698,435,695.76/427,400.93
  6. Step 6: Final answer
    x = 556,148.61

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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.