Home / 491,810.02-678,699.25-285,118.72

Finding the Fourth Proportional to 491,810.02, 678,699.25 and 285,118.72

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Solution

The fourth proportional to 491,810.02, 678,699.25 and 285,118.72 is: 393,464.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,810.02 : 678,699.25 = 285,118.72 : x
  2. Step 2: Convert to fraction form
    491,810.02/678,699.25 = 285,118.72/x
  3. Step 3: Cross multiply
    491,810.02x = 678,699.25 × 285,118.72
  4. Step 4: Simplify right side
    491,810.02x = 193,509,859,015.42
  5. Step 5: Solve for x
    x = 193,509,859,015.42/491,810.02
  6. Step 6: Final answer
    x = 393,464.66

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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.