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Finding the Fourth Proportional to 1,380,596.64, 1,905,811.24 and 928,150.08

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Solution

The fourth proportional to 1,380,596.64, 1,905,811.24 and 928,150.08 is: 1,281,242.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,596.64 : 1,905,811.24 = 928,150.08 : x
  2. Step 2: Convert to fraction form
    1,380,596.64/1,905,811.24 = 928,150.08/x
  3. Step 3: Cross multiply
    1,380,596.64x = 1,905,811.24 × 928,150.08
  4. Step 4: Simplify right side
    1,380,596.64x = 1,768,878,854,870.90
  5. Step 5: Solve for x
    x = 1,768,878,854,870.90/1,380,596.64
  6. Step 6: Final answer
    x = 1,281,242.33

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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.