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Finding the Fourth Proportional to 720,795.52, 994,668.48 and 398,485.12

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Solution

The fourth proportional to 720,795.52, 994,668.48 and 398,485.12 is: 549,893.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,795.52 : 994,668.48 = 398,485.12 : x
  2. Step 2: Convert to fraction form
    720,795.52/994,668.48 = 398,485.12/x
  3. Step 3: Cross multiply
    720,795.52x = 994,668.48 × 398,485.12
  4. Step 4: Simplify right side
    720,795.52x = 396,360,588,613.02
  5. Step 5: Solve for x
    x = 396,360,588,613.02/720,795.52
  6. Step 6: Final answer
    x = 549,893.25

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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.