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Finding the Fourth Proportional to 1,286,769.92, 1,928,899.71 and 612,670.10

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Solution

The fourth proportional to 1,286,769.92, 1,928,899.71 and 612,670.10 is: 918,407.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,769.92 : 1,928,899.71 = 612,670.10 : x
  2. Step 2: Convert to fraction form
    1,286,769.92/1,928,899.71 = 612,670.10/x
  3. Step 3: Cross multiply
    1,286,769.92x = 1,928,899.71 × 612,670.10
  4. Step 4: Simplify right side
    1,286,769.92x = 1,181,779,168,571.17
  5. Step 5: Solve for x
    x = 1,181,779,168,571.17/1,286,769.92
  6. Step 6: Final answer
    x = 918,407.52

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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.