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Finding the Fourth Proportional to 715,860.75, 987,076.22 and 457,396.23

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Solution

The fourth proportional to 715,860.75, 987,076.22 and 457,396.23 is: 630,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,860.75 : 987,076.22 = 457,396.23 : x
  2. Step 2: Convert to fraction form
    715,860.75/987,076.22 = 457,396.23/x
  3. Step 3: Cross multiply
    715,860.75x = 987,076.22 × 457,396.23
  4. Step 4: Simplify right side
    715,860.75x = 451,484,939,463.67
  5. Step 5: Solve for x
    x = 451,484,939,463.67/715,860.75
  6. Step 6: Final answer
    x = 630,688.22

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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.