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Finding the Fourth Proportional to 659,318.68, 989,785.38 and 434,866.84

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Solution

The fourth proportional to 659,318.68, 989,785.38 and 434,866.84 is: 652,832.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,318.68 : 989,785.38 = 434,866.84 : x
  2. Step 2: Convert to fraction form
    659,318.68/989,785.38 = 434,866.84/x
  3. Step 3: Cross multiply
    659,318.68x = 989,785.38 × 434,866.84
  4. Step 4: Simplify right side
    659,318.68x = 430,424,840,478.80
  5. Step 5: Solve for x
    x = 430,424,840,478.80/659,318.68
  6. Step 6: Final answer
    x = 652,832.77

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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.