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Finding the Fourth Proportional to 1,223,367.03, 1,688,860.13 and 764,736.72

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Solution

The fourth proportional to 1,223,367.03, 1,688,860.13 and 764,736.72 is: 1,055,720.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,367.03 : 1,688,860.13 = 764,736.72 : x
  2. Step 2: Convert to fraction form
    1,223,367.03/1,688,860.13 = 764,736.72/x
  3. Step 3: Cross multiply
    1,223,367.03x = 1,688,860.13 × 764,736.72
  4. Step 4: Simplify right side
    1,223,367.03x = 1,291,533,352,531.29
  5. Step 5: Solve for x
    x = 1,291,533,352,531.29/1,223,367.03
  6. Step 6: Final answer
    x = 1,055,720.25

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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.