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Finding the Fourth Proportional to 307,689.84, 424,024.64 and 221,496.77

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Solution

The fourth proportional to 307,689.84, 424,024.64 and 221,496.77 is: 305,242.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,689.84 : 424,024.64 = 221,496.77 : x
  2. Step 2: Convert to fraction form
    307,689.84/424,024.64 = 221,496.77/x
  3. Step 3: Cross multiply
    307,689.84x = 424,024.64 × 221,496.77
  4. Step 4: Simplify right side
    307,689.84x = 93,920,084,932.81
  5. Step 5: Solve for x
    x = 93,920,084,932.81/307,689.84
  6. Step 6: Final answer
    x = 305,242.72

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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.