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Finding the Fourth Proportional to 395,436.12, 545,740.92 and 225,695.76

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Solution

The fourth proportional to 395,436.12, 545,740.92 and 225,695.76 is: 311,482.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,436.12 : 545,740.92 = 225,695.76 : x
  2. Step 2: Convert to fraction form
    395,436.12/545,740.92 = 225,695.76/x
  3. Step 3: Cross multiply
    395,436.12x = 545,740.92 × 225,695.76
  4. Step 4: Simplify right side
    395,436.12x = 123,171,411,702.50
  5. Step 5: Solve for x
    x = 123,171,411,702.50/395,436.12
  6. Step 6: Final answer
    x = 311,482.45

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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.