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Finding the Fourth Proportional to 371,909.81, 513,235.58 and 221,006.81

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Solution

The fourth proportional to 371,909.81, 513,235.58 and 221,006.81 is: 304,989.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,909.81 : 513,235.58 = 221,006.81 : x
  2. Step 2: Convert to fraction form
    371,909.81/513,235.58 = 221,006.81/x
  3. Step 3: Cross multiply
    371,909.81x = 513,235.58 × 221,006.81
  4. Step 4: Simplify right side
    371,909.81x = 113,428,558,492.36
  5. Step 5: Solve for x
    x = 113,428,558,492.36/371,909.81
  6. Step 6: Final answer
    x = 304,989.42

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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.