Home / 1,391,975.96-1,921,002.08-780,325.18

Finding the Fourth Proportional to 1,391,975.96, 1,921,002.08 and 780,325.18

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Solution

The fourth proportional to 1,391,975.96, 1,921,002.08 and 780,325.18 is: 1,076,890.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,975.96 : 1,921,002.08 = 780,325.18 : x
  2. Step 2: Convert to fraction form
    1,391,975.96/1,921,002.08 = 780,325.18/x
  3. Step 3: Cross multiply
    1,391,975.96x = 1,921,002.08 × 780,325.18
  4. Step 4: Simplify right side
    1,391,975.96x = 1,499,006,285,152.24
  5. Step 5: Solve for x
    x = 1,499,006,285,152.24/1,391,975.96
  6. Step 6: Final answer
    x = 1,076,890.93

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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.