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Finding the Fourth Proportional to 379,077.78, 565,715.40 and 338,642.70

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Solution

The fourth proportional to 379,077.78, 565,715.40 and 338,642.70 is: 505,372.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,077.78 : 565,715.40 = 338,642.70 : x
  2. Step 2: Convert to fraction form
    379,077.78/565,715.40 = 338,642.70/x
  3. Step 3: Cross multiply
    379,077.78x = 565,715.40 × 338,642.70
  4. Step 4: Simplify right side
    379,077.78x = 191,575,390,487.58
  5. Step 5: Solve for x
    x = 191,575,390,487.58/379,077.78
  6. Step 6: Final answer
    x = 505,372.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.