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Finding the Fourth Proportional to 919,152.60, 1,378,728.90 and 618,002.70

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Solution

The fourth proportional to 919,152.60, 1,378,728.90 and 618,002.70 is: 927,004.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,152.60 : 1,378,728.90 = 618,002.70 : x
  2. Step 2: Convert to fraction form
    919,152.60/1,378,728.90 = 618,002.70/x
  3. Step 3: Cross multiply
    919,152.60x = 1,378,728.90 × 618,002.70
  4. Step 4: Simplify right side
    919,152.60x = 852,058,182,768.03
  5. Step 5: Solve for x
    x = 852,058,182,768.03/919,152.60
  6. Step 6: Final answer
    x = 927,004.05

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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.