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Finding the Fourth Proportional to 624,869.80, 862,318.60 and 338,389.81

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Solution

The fourth proportional to 624,869.80, 862,318.60 and 338,389.81 is: 466,977.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,869.80 : 862,318.60 = 338,389.81 : x
  2. Step 2: Convert to fraction form
    624,869.80/862,318.60 = 338,389.81/x
  3. Step 3: Cross multiply
    624,869.80x = 862,318.60 × 338,389.81
  4. Step 4: Simplify right side
    624,869.80x = 291,799,824,211.70
  5. Step 5: Solve for x
    x = 291,799,824,211.70/624,869.80
  6. Step 6: Final answer
    x = 466,977.00

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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.