Home / 641,973.48-885,836.52-355,486.20

Finding the Fourth Proportional to 641,973.48, 885,836.52 and 355,486.20

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Solution

The fourth proportional to 641,973.48, 885,836.52 and 355,486.20 is: 490,522.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,973.48 : 885,836.52 = 355,486.20 : x
  2. Step 2: Convert to fraction form
    641,973.48/885,836.52 = 355,486.20/x
  3. Step 3: Cross multiply
    641,973.48x = 885,836.52 × 355,486.20
  4. Step 4: Simplify right side
    641,973.48x = 314,902,658,316.02
  5. Step 5: Solve for x
    x = 314,902,658,316.02/641,973.48
  6. Step 6: Final answer
    x = 490,522.85

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Half scale
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Double scale
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Similar ratio
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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.