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Finding the Fourth Proportional to 648,728.40, 972,574.20 and 274,443.60

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Solution

The fourth proportional to 648,728.40, 972,574.20 and 274,443.60 is: 411,446.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,728.40 : 972,574.20 = 274,443.60 : x
  2. Step 2: Convert to fraction form
    648,728.40/972,574.20 = 274,443.60/x
  3. Step 3: Cross multiply
    648,728.40x = 972,574.20 × 274,443.60
  4. Step 4: Simplify right side
    648,728.40x = 266,916,764,715.12
  5. Step 5: Solve for x
    x = 266,916,764,715.12/648,728.40
  6. Step 6: Final answer
    x = 411,446.09

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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.