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Finding the Fourth Proportional to 391,085.13, 539,697.44 and 212,237.13

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Solution

The fourth proportional to 391,085.13, 539,697.44 and 212,237.13 is: 292,887.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,085.13 : 539,697.44 = 212,237.13 : x
  2. Step 2: Convert to fraction form
    391,085.13/539,697.44 = 212,237.13/x
  3. Step 3: Cross multiply
    391,085.13x = 539,697.44 × 212,237.13
  4. Step 4: Simplify right side
    391,085.13x = 114,543,834,672.76
  5. Step 5: Solve for x
    x = 114,543,834,672.76/391,085.13
  6. Step 6: Final answer
    x = 292,887.22

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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.