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Finding the Fourth Proportional to 486,088.38, 670,439.70 and 356,986.98

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Solution

The fourth proportional to 486,088.38, 670,439.70 and 356,986.98 is: 492,375.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,088.38 : 670,439.70 = 356,986.98 : x
  2. Step 2: Convert to fraction form
    486,088.38/670,439.70 = 356,986.98/x
  3. Step 3: Cross multiply
    486,088.38x = 670,439.70 × 356,986.98
  4. Step 4: Simplify right side
    486,088.38x = 239,338,243,775.11
  5. Step 5: Solve for x
    x = 239,338,243,775.11/486,088.38
  6. Step 6: Final answer
    x = 492,375.98

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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.