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Finding the Fourth Proportional to 715,860.25, 987,075.52 and 457,395.73

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Solution

The fourth proportional to 715,860.25, 987,075.52 and 457,395.73 is: 630,687.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,860.25 : 987,075.52 = 457,395.73 : x
  2. Step 2: Convert to fraction form
    715,860.25/987,075.52 = 457,395.73/x
  3. Step 3: Cross multiply
    715,860.25x = 987,075.52 × 457,395.73
  4. Step 4: Simplify right side
    715,860.25x = 451,484,128,035.53
  5. Step 5: Solve for x
    x = 451,484,128,035.53/715,860.25
  6. Step 6: Final answer
    x = 630,687.52

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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.