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Finding the Fourth Proportional to 384,447.84, 530,554.12 and 221,104.45

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Solution

The fourth proportional to 384,447.84, 530,554.12 and 221,104.45 is: 305,133.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,447.84 : 530,554.12 = 221,104.45 : x
  2. Step 2: Convert to fraction form
    384,447.84/530,554.12 = 221,104.45/x
  3. Step 3: Cross multiply
    384,447.84x = 530,554.12 × 221,104.45
  4. Step 4: Simplify right side
    384,447.84x = 117,307,876,345.07
  5. Step 5: Solve for x
    x = 117,307,876,345.07/384,447.84
  6. Step 6: Final answer
    x = 305,133.40

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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.