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Finding the Fourth Proportional to 459,711.20, 688,011.60 and 459,711.20

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Solution

The fourth proportional to 459,711.20, 688,011.60 and 459,711.20 is: 688,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,711.20 : 688,011.60 = 459,711.20 : x
  2. Step 2: Convert to fraction form
    459,711.20/688,011.60 = 459,711.20/x
  3. Step 3: Cross multiply
    459,711.20x = 688,011.60 × 459,711.20
  4. Step 4: Simplify right side
    459,711.20x = 316,286,638,249.92
  5. Step 5: Solve for x
    x = 316,286,638,249.92/459,711.20
  6. Step 6: Final answer
    x = 688,011.60

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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.