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Finding the Fourth Proportional to 917,129.60, 1,373,361.60 and 875,139.20

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Solution

The fourth proportional to 917,129.60, 1,373,361.60 and 875,139.20 is: 1,310,482.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,129.60 : 1,373,361.60 = 875,139.20 : x
  2. Step 2: Convert to fraction form
    917,129.60/1,373,361.60 = 875,139.20/x
  3. Step 3: Cross multiply
    917,129.60x = 1,373,361.60 × 875,139.20
  4. Step 4: Simplify right side
    917,129.60x = 1,201,882,571,934.72
  5. Step 5: Solve for x
    x = 1,201,882,571,934.72/917,129.60
  6. Step 6: Final answer
    x = 1,310,482.81

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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.