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Finding the Fourth Proportional to 618,807.70, 928,081.95 and 303,490.90

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Solution

The fourth proportional to 618,807.70, 928,081.95 and 303,490.90 is: 455,172.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,807.70 : 928,081.95 = 303,490.90 : x
  2. Step 2: Convert to fraction form
    618,807.70/928,081.95 = 303,490.90/x
  3. Step 3: Cross multiply
    618,807.70x = 928,081.95 × 303,490.90
  4. Step 4: Simplify right side
    618,807.70x = 281,664,426,279.26
  5. Step 5: Solve for x
    x = 281,664,426,279.26/618,807.70
  6. Step 6: Final answer
    x = 455,172.79

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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.