Home / 645,385.65-968,139.18-189,977.18

Finding the Fourth Proportional to 645,385.65, 968,139.18 and 189,977.18

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Solution

The fourth proportional to 645,385.65, 968,139.18 and 189,977.18 is: 284,983.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,385.65 : 968,139.18 = 189,977.18 : x
  2. Step 2: Convert to fraction form
    645,385.65/968,139.18 = 189,977.18/x
  3. Step 3: Cross multiply
    645,385.65x = 968,139.18 × 189,977.18
  4. Step 4: Simplify right side
    645,385.65x = 183,924,353,684.26
  5. Step 5: Solve for x
    x = 183,924,353,684.26/645,385.65
  6. Step 6: Final answer
    x = 284,983.64

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Double scale
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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.