Home / 642,068.78-886,054.55-355,588.58

Finding the Fourth Proportional to 642,068.78, 886,054.55 and 355,588.58

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Solution

The fourth proportional to 642,068.78, 886,054.55 and 355,588.58 is: 490,712.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,068.78 : 886,054.55 = 355,588.58 : x
  2. Step 2: Convert to fraction form
    642,068.78/886,054.55 = 355,588.58/x
  3. Step 3: Cross multiply
    642,068.78x = 886,054.55 × 355,588.58
  4. Step 4: Simplify right side
    642,068.78x = 315,070,879,674.23
  5. Step 5: Solve for x
    x = 315,070,879,674.23/642,068.78
  6. Step 6: Final answer
    x = 490,712.04

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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.