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Finding the Fourth Proportional to 459,269.68, 688,826.79 and 139,344.40

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Solution

The fourth proportional to 459,269.68, 688,826.79 and 139,344.40 is: 208,993.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,269.68 : 688,826.79 = 139,344.40 : x
  2. Step 2: Convert to fraction form
    459,269.68/688,826.79 = 139,344.40/x
  3. Step 3: Cross multiply
    459,269.68x = 688,826.79 × 139,344.40
  4. Step 4: Simplify right side
    459,269.68x = 95,984,159,405.45
  5. Step 5: Solve for x
    x = 95,984,159,405.45/459,269.68
  6. Step 6: Final answer
    x = 208,993.02

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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.