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Finding the Fourth Proportional to 645,790.47, 968,686.51 and 308,751.90

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Solution

The fourth proportional to 645,790.47, 968,686.51 and 308,751.90 is: 463,128.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,790.47 : 968,686.51 = 308,751.90 : x
  2. Step 2: Convert to fraction form
    645,790.47/968,686.51 = 308,751.90/x
  3. Step 3: Cross multiply
    645,790.47x = 968,686.51 × 308,751.90
  4. Step 4: Simplify right side
    645,790.47x = 299,083,800,466.87
  5. Step 5: Solve for x
    x = 299,083,800,466.87/645,790.47
  6. Step 6: Final answer
    x = 463,128.23

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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.