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Finding the Fourth Proportional to 459,121.37, 688,694.37 and 143,578.28

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Solution

The fourth proportional to 459,121.37, 688,694.37 and 143,578.28 is: 215,371.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,121.37 : 688,694.37 = 143,578.28 : x
  2. Step 2: Convert to fraction form
    459,121.37/688,694.37 = 143,578.28/x
  3. Step 3: Cross multiply
    459,121.37x = 688,694.37 × 143,578.28
  4. Step 4: Simplify right side
    459,121.37x = 98,881,549,646.81
  5. Step 5: Solve for x
    x = 98,881,549,646.81/459,121.37
  6. Step 6: Final answer
    x = 215,371.27

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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.