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Finding the Fourth Proportional to 1,532,986.64, 2,115,543.56 and 879,719.12

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Solution

The fourth proportional to 1,532,986.64, 2,115,543.56 and 879,719.12 is: 1,214,025.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,532,986.64 : 2,115,543.56 = 879,719.12 : x
  2. Step 2: Convert to fraction form
    1,532,986.64/2,115,543.56 = 879,719.12/x
  3. Step 3: Cross multiply
    1,532,986.64x = 2,115,543.56 × 879,719.12
  4. Step 4: Simplify right side
    1,532,986.64x = 1,861,084,118,924.87
  5. Step 5: Solve for x
    x = 1,861,084,118,924.87/1,532,986.64
  6. Step 6: Final answer
    x = 1,214,025.01

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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.