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Finding the Fourth Proportional to 720,372.08, 994,086.72 and 398,075.52

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Solution

The fourth proportional to 720,372.08, 994,086.72 and 398,075.52 is: 549,329.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,372.08 : 994,086.72 = 398,075.52 : x
  2. Step 2: Convert to fraction form
    720,372.08/994,086.72 = 398,075.52/x
  3. Step 3: Cross multiply
    720,372.08x = 994,086.72 × 398,075.52
  4. Step 4: Simplify right side
    720,372.08x = 395,721,587,989.09
  5. Step 5: Solve for x
    x = 395,721,587,989.09/720,372.08
  6. Step 6: Final answer
    x = 549,329.44

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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.