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Finding the Fourth Proportional to 648,014.70, 972,022.05 and 644,078.10

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Solution

The fourth proportional to 648,014.70, 972,022.05 and 644,078.10 is: 966,117.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,014.70 : 972,022.05 = 644,078.10 : x
  2. Step 2: Convert to fraction form
    648,014.70/972,022.05 = 644,078.10/x
  3. Step 3: Cross multiply
    648,014.70x = 972,022.05 × 644,078.10
  4. Step 4: Simplify right side
    648,014.70x = 626,058,115,122.11
  5. Step 5: Solve for x
    x = 626,058,115,122.11/648,014.70
  6. Step 6: Final answer
    x = 966,117.15

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Double scale
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Similar ratio
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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.