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Finding the Fourth Proportional to 720,513.66, 994,360.32 and 398,216.84

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Solution

The fourth proportional to 720,513.66, 994,360.32 and 398,216.84 is: 549,567.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,513.66 : 994,360.32 = 398,216.84 : x
  2. Step 2: Convert to fraction form
    720,513.66/994,360.32 = 398,216.84/x
  3. Step 3: Cross multiply
    720,513.66x = 994,360.32 × 398,216.84
  4. Step 4: Simplify right side
    720,513.66x = 395,971,019,479.99
  5. Step 5: Solve for x
    x = 395,971,019,479.99/720,513.66
  6. Step 6: Final answer
    x = 549,567.68

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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.