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Finding the Fourth Proportional to 722,840.16, 997,507.45 and 396,150.66

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Solution

The fourth proportional to 722,840.16, 997,507.45 and 396,150.66 is: 546,681.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,840.16 : 997,507.45 = 396,150.66 : x
  2. Step 2: Convert to fraction form
    722,840.16/997,507.45 = 396,150.66/x
  3. Step 3: Cross multiply
    722,840.16x = 997,507.45 × 396,150.66
  4. Step 4: Simplify right side
    722,840.16x = 395,163,234,672.42
  5. Step 5: Solve for x
    x = 395,163,234,672.42/722,840.16
  6. Step 6: Final answer
    x = 546,681.35

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Similar ratio
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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.