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Finding the Fourth Proportional to 713,958.50, 985,275.70 and 391,685.06

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Solution

The fourth proportional to 713,958.50, 985,275.70 and 391,685.06 is: 540,532.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,958.50 : 985,275.70 = 391,685.06 : x
  2. Step 2: Convert to fraction form
    713,958.50/985,275.70 = 391,685.06/x
  3. Step 3: Cross multiply
    713,958.50x = 985,275.70 × 391,685.06
  4. Step 4: Simplify right side
    713,958.50x = 385,917,771,671.04
  5. Step 5: Solve for x
    x = 385,917,771,671.04/713,958.50
  6. Step 6: Final answer
    x = 540,532.50

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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.