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Finding the Fourth Proportional to 713,412.37, 984,508.80 and 391,115.57

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Solution

The fourth proportional to 713,412.37, 984,508.80 and 391,115.57 is: 539,739.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,412.37 : 984,508.80 = 391,115.57 : x
  2. Step 2: Convert to fraction form
    713,412.37/984,508.80 = 391,115.57/x
  3. Step 3: Cross multiply
    713,412.37x = 984,508.80 × 391,115.57
  4. Step 4: Simplify right side
    713,412.37x = 385,056,720,482.02
  5. Step 5: Solve for x
    x = 385,056,720,482.02/713,412.37
  6. Step 6: Final answer
    x = 539,739.34

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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.