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Finding the Fourth Proportional to 465,390.80, 642,238.90 and 264,186.80

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Solution

The fourth proportional to 465,390.80, 642,238.90 and 264,186.80 is: 364,577.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,390.80 : 642,238.90 = 264,186.80 : x
  2. Step 2: Convert to fraction form
    465,390.80/642,238.90 = 264,186.80/x
  3. Step 3: Cross multiply
    465,390.80x = 642,238.90 × 264,186.80
  4. Step 4: Simplify right side
    465,390.80x = 169,671,039,826.52
  5. Step 5: Solve for x
    x = 169,671,039,826.52/465,390.80
  6. Step 6: Final answer
    x = 364,577.55

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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.