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Finding the Fourth Proportional to 459,145.80, 688,718.70 and 347,171.40

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Solution

The fourth proportional to 459,145.80, 688,718.70 and 347,171.40 is: 520,757.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,145.80 : 688,718.70 = 347,171.40 : x
  2. Step 2: Convert to fraction form
    459,145.80/688,718.70 = 347,171.40/x
  3. Step 3: Cross multiply
    459,145.80x = 688,718.70 × 347,171.40
  4. Step 4: Simplify right side
    459,145.80x = 239,103,435,285.18
  5. Step 5: Solve for x
    x = 239,103,435,285.18/459,145.80
  6. Step 6: Final answer
    x = 520,757.10

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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.