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Finding the Fourth Proportional to 403,001.69, 556,142.32 and 221,709.72

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Solution

The fourth proportional to 403,001.69, 556,142.32 and 221,709.72 is: 305,959.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,001.69 : 556,142.32 = 221,709.72 : x
  2. Step 2: Convert to fraction form
    403,001.69/556,142.32 = 221,709.72/x
  3. Step 3: Cross multiply
    403,001.69x = 556,142.32 × 221,709.72
  4. Step 4: Simplify right side
    403,001.69x = 123,302,158,047.35
  5. Step 5: Solve for x
    x = 123,302,158,047.35/403,001.69
  6. Step 6: Final answer
    x = 305,959.41

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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.