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Finding the Fourth Proportional to 638,411.40, 957,617.10 and 559,614.60

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Solution

The fourth proportional to 638,411.40, 957,617.10 and 559,614.60 is: 839,421.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,411.40 : 957,617.10 = 559,614.60 : x
  2. Step 2: Convert to fraction form
    638,411.40/957,617.10 = 559,614.60/x
  3. Step 3: Cross multiply
    638,411.40x = 957,617.10 × 559,614.60
  4. Step 4: Simplify right side
    638,411.40x = 535,896,510,369.66
  5. Step 5: Solve for x
    x = 535,896,510,369.66/638,411.40
  6. Step 6: Final answer
    x = 839,421.90

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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.