Home / 915,640.20-1,373,460.30-780,337.80

Finding the Fourth Proportional to 915,640.20, 1,373,460.30 and 780,337.80

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Solution

The fourth proportional to 915,640.20, 1,373,460.30 and 780,337.80 is: 1,170,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,640.20 : 1,373,460.30 = 780,337.80 : x
  2. Step 2: Convert to fraction form
    915,640.20/1,373,460.30 = 780,337.80/x
  3. Step 3: Cross multiply
    915,640.20x = 1,373,460.30 × 780,337.80
  4. Step 4: Simplify right side
    915,640.20x = 1,071,762,988,889.34
  5. Step 5: Solve for x
    x = 1,071,762,988,889.34/915,640.20
  6. Step 6: Final answer
    x = 1,170,506.70

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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.