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Finding the Fourth Proportional to 786,561.12, 1,085,537.63 and 480,816.47

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Solution

The fourth proportional to 786,561.12, 1,085,537.63 and 480,816.47 is: 663,577.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,561.12 : 1,085,537.63 = 480,816.47 : x
  2. Step 2: Convert to fraction form
    786,561.12/1,085,537.63 = 480,816.47/x
  3. Step 3: Cross multiply
    786,561.12x = 1,085,537.63 × 480,816.47
  4. Step 4: Simplify right side
    786,561.12x = 521,944,375,224.65
  5. Step 5: Solve for x
    x = 521,944,375,224.65/786,561.12
  6. Step 6: Final answer
    x = 663,577.64

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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.