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Finding the Fourth Proportional to 2,789,568, 4,184,352 and 688,320

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Solution

The fourth proportional to 2,789,568, 4,184,352 and 688,320 is: 1,032,480

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789,568 : 4,184,352 = 688,320 : x
  2. Step 2: Convert to fraction form
    2,789,568/4,184,352 = 688,320/x
  3. Step 3: Cross multiply
    2,789,568x = 4,184,352 × 688,320
  4. Step 4: Simplify right side
    2,789,568x = 2,880,173,168,640
  5. Step 5: Solve for x
    x = 2,880,173,168,640/2,789,568
  6. Step 6: Final answer
    x = 1,032,480

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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.