Home / 1,318,945.20-1,978,417.80-780,068.40

Finding the Fourth Proportional to 1,318,945.20, 1,978,417.80 and 780,068.40

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Solution

The fourth proportional to 1,318,945.20, 1,978,417.80 and 780,068.40 is: 1,170,102.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,945.20 : 1,978,417.80 = 780,068.40 : x
  2. Step 2: Convert to fraction form
    1,318,945.20/1,978,417.80 = 780,068.40/x
  3. Step 3: Cross multiply
    1,318,945.20x = 1,978,417.80 × 780,068.40
  4. Step 4: Simplify right side
    1,318,945.20x = 1,543,301,207,777.52
  5. Step 5: Solve for x
    x = 1,543,301,207,777.52/1,318,945.20
  6. Step 6: Final answer
    x = 1,170,102.60

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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.