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Finding the Fourth Proportional to 459,309.16, 688,591.98 and 143,603.56

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Solution

The fourth proportional to 459,309.16, 688,591.98 and 143,603.56 is: 215,289.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,309.16 : 688,591.98 = 143,603.56 : x
  2. Step 2: Convert to fraction form
    459,309.16/688,591.98 = 143,603.56/x
  3. Step 3: Cross multiply
    459,309.16x = 688,591.98 × 143,603.56
  4. Step 4: Simplify right side
    459,309.16x = 98,884,259,715.45
  5. Step 5: Solve for x
    x = 98,884,259,715.45/459,309.16
  6. Step 6: Final answer
    x = 215,289.11

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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.