Home / 753,821.40-1,130,787.48-280,506.72

Finding the Fourth Proportional to 753,821.40, 1,130,787.48 and 280,506.72

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Solution

The fourth proportional to 753,821.40, 1,130,787.48 and 280,506.72 is: 420,780.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    753,821.40 : 1,130,787.48 = 280,506.72 : x
  2. Step 2: Convert to fraction form
    753,821.40/1,130,787.48 = 280,506.72/x
  3. Step 3: Cross multiply
    753,821.40x = 1,130,787.48 × 280,506.72
  4. Step 4: Simplify right side
    753,821.40x = 317,193,487,031.87
  5. Step 5: Solve for x
    x = 317,193,487,031.87/753,821.40
  6. Step 6: Final answer
    x = 420,780.69

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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.