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Finding the Fourth Proportional to 525,638.40, 788,457.60 and 327,220.80

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Solution

The fourth proportional to 525,638.40, 788,457.60 and 327,220.80 is: 490,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,638.40 : 788,457.60 = 327,220.80 : x
  2. Step 2: Convert to fraction form
    525,638.40/788,457.60 = 327,220.80/x
  3. Step 3: Cross multiply
    525,638.40x = 788,457.60 × 327,220.80
  4. Step 4: Simplify right side
    525,638.40x = 257,999,726,638.08
  5. Step 5: Solve for x
    x = 257,999,726,638.08/525,638.40
  6. Step 6: Final answer
    x = 490,831.20

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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.