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Finding the Fourth Proportional to 383,139.84, 528,680.96 and 213,340.16

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Solution

The fourth proportional to 383,139.84, 528,680.96 and 213,340.16 is: 294,380.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,139.84 : 528,680.96 = 213,340.16 : x
  2. Step 2: Convert to fraction form
    383,139.84/528,680.96 = 213,340.16/x
  3. Step 3: Cross multiply
    383,139.84x = 528,680.96 × 213,340.16
  4. Step 4: Simplify right side
    383,139.84x = 112,788,880,595.35
  5. Step 5: Solve for x
    x = 112,788,880,595.35/383,139.84
  6. Step 6: Final answer
    x = 294,380.46

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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.