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Finding the Fourth Proportional to 391,314.60, 586,971.90 and 202,357.80

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Solution

The fourth proportional to 391,314.60, 586,971.90 and 202,357.80 is: 303,536.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,314.60 : 586,971.90 = 202,357.80 : x
  2. Step 2: Convert to fraction form
    391,314.60/586,971.90 = 202,357.80/x
  3. Step 3: Cross multiply
    391,314.60x = 586,971.90 × 202,357.80
  4. Step 4: Simplify right side
    391,314.60x = 118,778,342,345.82
  5. Step 5: Solve for x
    x = 118,778,342,345.82/391,314.60
  6. Step 6: Final answer
    x = 303,536.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.