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Finding the Fourth Proportional to 1,318,891.10, 1,978,855.05 and 520,036.70

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Solution

The fourth proportional to 1,318,891.10, 1,978,855.05 and 520,036.70 is: 780,259.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,891.10 : 1,978,855.05 = 520,036.70 : x
  2. Step 2: Convert to fraction form
    1,318,891.10/1,978,855.05 = 520,036.70/x
  3. Step 3: Cross multiply
    1,318,891.10x = 1,978,855.05 × 520,036.70
  4. Step 4: Simplify right side
    1,318,891.10x = 1,029,077,249,980.34
  5. Step 5: Solve for x
    x = 1,029,077,249,980.34/1,318,891.10
  6. Step 6: Final answer
    x = 780,259.45

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.