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Finding the Fourth Proportional to 713,756.88, 985,012.12 and 391,480.56

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Solution

The fourth proportional to 713,756.88, 985,012.12 and 391,480.56 is: 540,258.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,756.88 : 985,012.12 = 391,480.56 : x
  2. Step 2: Convert to fraction form
    713,756.88/985,012.12 = 391,480.56/x
  3. Step 3: Cross multiply
    713,756.88x = 985,012.12 × 391,480.56
  4. Step 4: Simplify right side
    713,756.88x = 385,613,096,344.39
  5. Step 5: Solve for x
    x = 385,613,096,344.39/713,756.88
  6. Step 6: Final answer
    x = 540,258.32

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1.5x scale

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.