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Finding the Fourth Proportional to 720,219.20, 993,922.55 and 397,950.07

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Solution

The fourth proportional to 720,219.20, 993,922.55 and 397,950.07 is: 549,182.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,219.20 : 993,922.55 = 397,950.07 : x
  2. Step 2: Convert to fraction form
    720,219.20/993,922.55 = 397,950.07/x
  3. Step 3: Cross multiply
    720,219.20x = 993,922.55 × 397,950.07
  4. Step 4: Simplify right side
    720,219.20x = 395,531,548,347.08
  5. Step 5: Solve for x
    x = 395,531,548,347.08/720,219.20
  6. Step 6: Final answer
    x = 549,182.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.