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Finding the Fourth Proportional to 612,141.45, 918,212.18 and 423,184.65

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Solution

The fourth proportional to 612,141.45, 918,212.18 and 423,184.65 is: 634,776.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,141.45 : 918,212.18 = 423,184.65 : x
  2. Step 2: Convert to fraction form
    612,141.45/918,212.18 = 423,184.65/x
  3. Step 3: Cross multiply
    612,141.45x = 918,212.18 × 423,184.65
  4. Step 4: Simplify right side
    612,141.45x = 388,573,297,903.11
  5. Step 5: Solve for x
    x = 388,573,297,903.11/612,141.45
  6. Step 6: Final answer
    x = 634,776.98

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Similar ratio
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1.5x scale

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.