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Finding the Fourth Proportional to 720,238.50, 993,925.08 and 397,948.68

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Solution

The fourth proportional to 720,238.50, 993,925.08 and 397,948.68 is: 549,166.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,238.50 : 993,925.08 = 397,948.68 : x
  2. Step 2: Convert to fraction form
    720,238.50/993,925.08 = 397,948.68/x
  3. Step 3: Cross multiply
    720,238.50x = 993,925.08 × 397,948.68
  4. Step 4: Simplify right side
    720,238.50x = 395,531,173,604.89
  5. Step 5: Solve for x
    x = 395,531,173,604.89/720,238.50
  6. Step 6: Final answer
    x = 549,166.94

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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.