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Finding the Fourth Proportional to 631,763.80, 871,834.08 and 345,283.89

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Solution

The fourth proportional to 631,763.80, 871,834.08 and 345,283.89 is: 476,491.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,763.80 : 871,834.08 = 345,283.89 : x
  2. Step 2: Convert to fraction form
    631,763.80/871,834.08 = 345,283.89/x
  3. Step 3: Cross multiply
    631,763.80x = 871,834.08 × 345,283.89
  4. Step 4: Simplify right side
    631,763.80x = 301,030,256,491.38
  5. Step 5: Solve for x
    x = 301,030,256,491.38/631,763.80
  6. Step 6: Final answer
    x = 476,491.78

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.