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Finding the Fourth Proportional to 1,301,975.88, 1,796,939.40 and 778,652.16

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Solution

The fourth proportional to 1,301,975.88, 1,796,939.40 and 778,652.16 is: 1,074,667.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,301,975.88 : 1,796,939.40 = 778,652.16 : x
  2. Step 2: Convert to fraction form
    1,301,975.88/1,796,939.40 = 778,652.16/x
  3. Step 3: Cross multiply
    1,301,975.88x = 1,796,939.40 × 778,652.16
  4. Step 4: Simplify right side
    1,301,975.88x = 1,399,190,745,199.10
  5. Step 5: Solve for x
    x = 1,399,190,745,199.10/1,301,975.88
  6. Step 6: Final answer
    x = 1,074,667.18

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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.