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Finding the Fourth Proportional to 648,506.70, 972,176.85 and 423,974.70

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Solution

The fourth proportional to 648,506.70, 972,176.85 and 423,974.70 is: 635,580.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,506.70 : 972,176.85 = 423,974.70 : x
  2. Step 2: Convert to fraction form
    648,506.70/972,176.85 = 423,974.70/x
  3. Step 3: Cross multiply
    648,506.70x = 972,176.85 × 423,974.70
  4. Step 4: Simplify right side
    648,506.70x = 412,178,388,325.70
  5. Step 5: Solve for x
    x = 412,178,388,325.70/648,506.70
  6. Step 6: Final answer
    x = 635,580.77

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Double scale
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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.