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Finding the Fourth Proportional to 713,671.39, 984,775.98 and 391,296.64

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Solution

The fourth proportional to 713,671.39, 984,775.98 and 391,296.64 is: 539,939.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,671.39 : 984,775.98 = 391,296.64 : x
  2. Step 2: Convert to fraction form
    713,671.39/984,775.98 = 391,296.64/x
  3. Step 3: Cross multiply
    713,671.39x = 984,775.98 × 391,296.64
  4. Step 4: Simplify right side
    713,671.39x = 385,339,532,126.71
  5. Step 5: Solve for x
    x = 385,339,532,126.71/713,671.39
  6. Step 6: Final answer
    x = 539,939.72

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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.