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Finding the Fourth Proportional to 713,425.54, 984,501.12 and 391,128.58

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Solution

The fourth proportional to 713,425.54, 984,501.12 and 391,128.58 is: 539,743.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,425.54 : 984,501.12 = 391,128.58 : x
  2. Step 2: Convert to fraction form
    713,425.54/984,501.12 = 391,128.58/x
  3. Step 3: Cross multiply
    713,425.54x = 984,501.12 × 391,128.58
  4. Step 4: Simplify right side
    713,425.54x = 385,066,525,074.01
  5. Step 5: Solve for x
    x = 385,066,525,074.01/713,425.54
  6. Step 6: Final answer
    x = 539,743.12

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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.