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Finding the Fourth Proportional to 245,920.10, 368,880.15 and 221,036.90

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Solution

The fourth proportional to 245,920.10, 368,880.15 and 221,036.90 is: 331,555.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,920.10 : 368,880.15 = 221,036.90 : x
  2. Step 2: Convert to fraction form
    245,920.10/368,880.15 = 221,036.90/x
  3. Step 3: Cross multiply
    245,920.10x = 368,880.15 × 221,036.90
  4. Step 4: Simplify right side
    245,920.10x = 81,536,124,827.54
  5. Step 5: Solve for x
    x = 81,536,124,827.54/245,920.10
  6. Step 6: Final answer
    x = 331,555.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.