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Finding the Fourth Proportional to 713,642.59, 984,840.31 and 391,333.47

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Solution

The fourth proportional to 713,642.59, 984,840.31 and 391,333.47 is: 540,047.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,642.59 : 984,840.31 = 391,333.47 : x
  2. Step 2: Convert to fraction form
    713,642.59/984,840.31 = 391,333.47/x
  3. Step 3: Cross multiply
    713,642.59x = 984,840.31 × 391,333.47
  4. Step 4: Simplify right side
    713,642.59x = 385,400,975,908.18
  5. Step 5: Solve for x
    x = 385,400,975,908.18/713,642.59
  6. Step 6: Final answer
    x = 540,047.61

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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.