Home / 661,531.93-991,045.81-390,850.59

Finding the Fourth Proportional to 661,531.93, 991,045.81 and 390,850.59

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Solution

The fourth proportional to 661,531.93, 991,045.81 and 390,850.59 is: 585,536.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,531.93 : 991,045.81 = 390,850.59 : x
  2. Step 2: Convert to fraction form
    661,531.93/991,045.81 = 390,850.59/x
  3. Step 3: Cross multiply
    661,531.93x = 991,045.81 × 390,850.59
  4. Step 4: Simplify right side
    661,531.93x = 387,350,839,555.53
  5. Step 5: Solve for x
    x = 387,350,839,555.53/661,531.93
  6. Step 6: Final answer
    x = 585,536.12

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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.