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Finding the Fourth Proportional to 720,210.68, 993,930.61 and 397,913.86

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Solution

The fourth proportional to 720,210.68, 993,930.61 and 397,913.86 is: 549,143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,210.68 : 993,930.61 = 397,913.86 : x
  2. Step 2: Convert to fraction form
    720,210.68/993,930.61 = 397,913.86/x
  3. Step 3: Cross multiply
    720,210.68x = 993,930.61 × 397,913.86
  4. Step 4: Simplify right side
    720,210.68x = 395,498,765,597.26
  5. Step 5: Solve for x
    x = 395,498,765,597.26/720,210.68
  6. Step 6: Final answer
    x = 549,143.16

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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.