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Finding the Fourth Proportional to 543,154.32, 749,385 and 316,639.44

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Solution

The fourth proportional to 543,154.32, 749,385 and 316,639.44 is: 436,864.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,154.32 : 749,385 = 316,639.44 : x
  2. Step 2: Convert to fraction form
    543,154.32/749,385 = 316,639.44/x
  3. Step 3: Cross multiply
    543,154.32x = 749,385 × 316,639.44
  4. Step 4: Simplify right side
    543,154.32x = 237,284,846,744.40
  5. Step 5: Solve for x
    x = 237,284,846,744.40/543,154.32
  6. Step 6: Final answer
    x = 436,864.51

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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.