Home / 687,416.40-1,030,710.42-308,268.63

Finding the Fourth Proportional to 687,416.40, 1,030,710.42 and 308,268.63

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Solution

The fourth proportional to 687,416.40, 1,030,710.42 and 308,268.63 is: 462,217.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,416.40 : 1,030,710.42 = 308,268.63 : x
  2. Step 2: Convert to fraction form
    687,416.40/1,030,710.42 = 308,268.63/x
  3. Step 3: Cross multiply
    687,416.40x = 1,030,710.42 × 308,268.63
  4. Step 4: Simplify right side
    687,416.40x = 317,735,689,100.13
  5. Step 5: Solve for x
    x = 317,735,689,100.13/687,416.40
  6. Step 6: Final answer
    x = 462,217.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.