Home / 642,074.04-886,051.31-355,587.98

Finding the Fourth Proportional to 642,074.04, 886,051.31 and 355,587.98

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Solution

The fourth proportional to 642,074.04, 886,051.31 and 355,587.98 is: 490,705.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,074.04 : 886,051.31 = 355,587.98 : x
  2. Step 2: Convert to fraction form
    642,074.04/886,051.31 = 355,587.98/x
  3. Step 3: Cross multiply
    642,074.04x = 886,051.31 × 355,587.98
  4. Step 4: Simplify right side
    642,074.04x = 315,069,189,291.06
  5. Step 5: Solve for x
    x = 315,069,189,291.06/642,074.04
  6. Step 6: Final answer
    x = 490,705.39

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Double scale
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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.