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Finding the Fourth Proportional to 402,916, 556,036.32 and 221,618.56

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Solution

The fourth proportional to 402,916, 556,036.32 and 221,618.56 is: 305,840.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,916 : 556,036.32 = 221,618.56 : x
  2. Step 2: Convert to fraction form
    402,916/556,036.32 = 221,618.56/x
  3. Step 3: Cross multiply
    402,916x = 556,036.32 × 221,618.56
  4. Step 4: Simplify right side
    402,916x = 123,227,968,546.10
  5. Step 5: Solve for x
    x = 123,227,968,546.10/402,916
  6. Step 6: Final answer
    x = 305,840.35

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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.