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Finding the Fourth Proportional to 470,686.20, 705,591.90 and 328,531.20

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Solution

The fourth proportional to 470,686.20, 705,591.90 and 328,531.20 is: 492,491.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,686.20 : 705,591.90 = 328,531.20 : x
  2. Step 2: Convert to fraction form
    470,686.20/705,591.90 = 328,531.20/x
  3. Step 3: Cross multiply
    470,686.20x = 705,591.90 × 328,531.20
  4. Step 4: Simplify right side
    470,686.20x = 231,808,953,617.28
  5. Step 5: Solve for x
    x = 231,808,953,617.28/470,686.20
  6. Step 6: Final answer
    x = 492,491.50

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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.