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Finding the Fourth Proportional to 388,358.94, 536,100.51 and 261,108.30

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Solution

The fourth proportional to 388,358.94, 536,100.51 and 261,108.30 is: 360,440.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,358.94 : 536,100.51 = 261,108.30 : x
  2. Step 2: Convert to fraction form
    388,358.94/536,100.51 = 261,108.30/x
  3. Step 3: Cross multiply
    388,358.94x = 536,100.51 × 261,108.30
  4. Step 4: Simplify right side
    388,358.94x = 139,980,292,795.23
  5. Step 5: Solve for x
    x = 139,980,292,795.23/388,358.94
  6. Step 6: Final answer
    x = 360,440.51

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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.