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Finding the Fourth Proportional to 492,390.12, 678,570.42 and 356,192.76

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Solution

The fourth proportional to 492,390.12, 678,570.42 and 356,192.76 is: 490,874.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,390.12 : 678,570.42 = 356,192.76 : x
  2. Step 2: Convert to fraction form
    492,390.12/678,570.42 = 356,192.76/x
  3. Step 3: Cross multiply
    492,390.12x = 678,570.42 × 356,192.76
  4. Step 4: Simplify right side
    492,390.12x = 241,701,870,754.16
  5. Step 5: Solve for x
    x = 241,701,870,754.16/492,390.12
  6. Step 6: Final answer
    x = 490,874.74

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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.