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Finding the Fourth Proportional to 371,665.48, 512,899.74 and 218,709.64

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Solution

The fourth proportional to 371,665.48, 512,899.74 and 218,709.64 is: 301,820.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,665.48 : 512,899.74 = 218,709.64 : x
  2. Step 2: Convert to fraction form
    371,665.48/512,899.74 = 218,709.64/x
  3. Step 3: Cross multiply
    371,665.48x = 512,899.74 × 218,709.64
  4. Step 4: Simplify right side
    371,665.48x = 112,176,117,491.49
  5. Step 5: Solve for x
    x = 112,176,117,491.49/371,665.48
  6. Step 6: Final answer
    x = 301,820.11

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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.