Home / 716,982.40-989,448.38-390,304.86

Finding the Fourth Proportional to 716,982.40, 989,448.38 and 390,304.86

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Solution

The fourth proportional to 716,982.40, 989,448.38 and 390,304.86 is: 538,627.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,982.40 : 989,448.38 = 390,304.86 : x
  2. Step 2: Convert to fraction form
    716,982.40/989,448.38 = 390,304.86/x
  3. Step 3: Cross multiply
    716,982.40x = 989,448.38 × 390,304.86
  4. Step 4: Simplify right side
    716,982.40x = 386,186,511,433.13
  5. Step 5: Solve for x
    x = 386,186,511,433.13/716,982.40
  6. Step 6: Final answer
    x = 538,627.60

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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.