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Finding the Fourth Proportional to 907,751.20, 1,362,064.20 and 640,937.20

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Solution

The fourth proportional to 907,751.20, 1,362,064.20 and 640,937.20 is: 961,714.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,751.20 : 1,362,064.20 = 640,937.20 : x
  2. Step 2: Convert to fraction form
    907,751.20/1,362,064.20 = 640,937.20/x
  3. Step 3: Cross multiply
    907,751.20x = 1,362,064.20 × 640,937.20
  4. Step 4: Simplify right side
    907,751.20x = 872,997,614,568.24
  5. Step 5: Solve for x
    x = 872,997,614,568.24/907,751.20
  6. Step 6: Final answer
    x = 961,714.64

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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.