Home / 920,639.65-1,380,959.58-280,946.74

Finding the Fourth Proportional to 920,639.65, 1,380,959.58 and 280,946.74

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Solution

The fourth proportional to 920,639.65, 1,380,959.58 and 280,946.74 is: 421,420.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,639.65 : 1,380,959.58 = 280,946.74 : x
  2. Step 2: Convert to fraction form
    920,639.65/1,380,959.58 = 280,946.74/x
  3. Step 3: Cross multiply
    920,639.65x = 1,380,959.58 × 280,946.74
  4. Step 4: Simplify right side
    920,639.65x = 387,976,085,630.42
  5. Step 5: Solve for x
    x = 387,976,085,630.42/920,639.65
  6. Step 6: Final answer
    x = 421,420.14

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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.