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Finding the Fourth Proportional to 485,748.30, 728,622.45 and 353,556.30

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Solution

The fourth proportional to 485,748.30, 728,622.45 and 353,556.30 is: 530,334.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,748.30 : 728,622.45 = 353,556.30 : x
  2. Step 2: Convert to fraction form
    485,748.30/728,622.45 = 353,556.30/x
  3. Step 3: Cross multiply
    485,748.30x = 728,622.45 × 353,556.30
  4. Step 4: Simplify right side
    485,748.30x = 257,609,057,518.94
  5. Step 5: Solve for x
    x = 257,609,057,518.94/485,748.30
  6. Step 6: Final answer
    x = 530,334.45

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Double scale
Find fourth proportional to 485,749.30, 728,623.95 and 353,557.30
Similar ratio
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1.5x scale

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.