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Finding the Fourth Proportional to 1,403,621.02, 1,936,964.64 and 830,670.76

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Solution

The fourth proportional to 1,403,621.02, 1,936,964.64 and 830,670.76 is: 1,146,306.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403,621.02 : 1,936,964.64 = 830,670.76 : x
  2. Step 2: Convert to fraction form
    1,403,621.02/1,936,964.64 = 830,670.76/x
  3. Step 3: Cross multiply
    1,403,621.02x = 1,936,964.64 × 830,670.76
  4. Step 4: Simplify right side
    1,403,621.02x = 1,608,979,889,601.93
  5. Step 5: Solve for x
    x = 1,608,979,889,601.93/1,403,621.02
  6. Step 6: Final answer
    x = 1,146,306.49

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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.