Home / 840,999.78-1,160,442.86-496,788.12

Finding the Fourth Proportional to 840,999.78, 1,160,442.86 and 496,788.12

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Solution

The fourth proportional to 840,999.78, 1,160,442.86 and 496,788.12 is: 685,486.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,999.78 : 1,160,442.86 = 496,788.12 : x
  2. Step 2: Convert to fraction form
    840,999.78/1,160,442.86 = 496,788.12/x
  3. Step 3: Cross multiply
    840,999.78x = 1,160,442.86 × 496,788.12
  4. Step 4: Simplify right side
    840,999.78x = 576,494,224,302.88
  5. Step 5: Solve for x
    x = 576,494,224,302.88/840,999.78
  6. Step 6: Final answer
    x = 685,486.77

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1.5x scale

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.