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Finding the Fourth Proportional to 442,817.40, 664,139.70 and 143,225.40

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Solution

The fourth proportional to 442,817.40, 664,139.70 and 143,225.40 is: 214,810.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,817.40 : 664,139.70 = 143,225.40 : x
  2. Step 2: Convert to fraction form
    442,817.40/664,139.70 = 143,225.40/x
  3. Step 3: Cross multiply
    442,817.40x = 664,139.70 × 143,225.40
  4. Step 4: Simplify right side
    442,817.40x = 95,121,674,188.38
  5. Step 5: Solve for x
    x = 95,121,674,188.38/442,817.40
  6. Step 6: Final answer
    x = 214,810.15

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1.5x scale

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.