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Finding the Fourth Proportional to 1,788,000.80, 2,679,927.60 and 722,343.20

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Solution

The fourth proportional to 1,788,000.80, 2,679,927.60 and 722,343.20 is: 1,082,677.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788,000.80 : 2,679,927.60 = 722,343.20 : x
  2. Step 2: Convert to fraction form
    1,788,000.80/2,679,927.60 = 722,343.20/x
  3. Step 3: Cross multiply
    1,788,000.80x = 2,679,927.60 × 722,343.20
  4. Step 4: Simplify right side
    1,788,000.80x = 1,935,827,478,352.32
  5. Step 5: Solve for x
    x = 1,935,827,478,352.32/1,788,000.80
  6. Step 6: Final answer
    x = 1,082,677.08

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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.