Home / 498,406.10-687,795.81-307,343.06

Finding the Fourth Proportional to 498,406.10, 687,795.81 and 307,343.06

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Solution

The fourth proportional to 498,406.10, 687,795.81 and 307,343.06 is: 424,130.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,406.10 : 687,795.81 = 307,343.06 : x
  2. Step 2: Convert to fraction form
    498,406.10/687,795.81 = 307,343.06/x
  3. Step 3: Cross multiply
    498,406.10x = 687,795.81 × 307,343.06
  4. Step 4: Simplify right side
    498,406.10x = 211,389,268,900.58
  5. Step 5: Solve for x
    x = 211,389,268,900.58/498,406.10
  6. Step 6: Final answer
    x = 424,130.58

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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.