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Finding the Fourth Proportional to 440,356.80, 660,073.44 and 215,406.72

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Solution

The fourth proportional to 440,356.80, 660,073.44 and 215,406.72 is: 322,884.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,356.80 : 660,073.44 = 215,406.72 : x
  2. Step 2: Convert to fraction form
    440,356.80/660,073.44 = 215,406.72/x
  3. Step 3: Cross multiply
    440,356.80x = 660,073.44 × 215,406.72
  4. Step 4: Simplify right side
    440,356.80x = 142,184,254,669.52
  5. Step 5: Solve for x
    x = 142,184,254,669.52/440,356.80
  6. Step 6: Final answer
    x = 322,884.20

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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.