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Finding the Fourth Proportional to 980,668.80, 1,353,240 and 550,915.20

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Solution

The fourth proportional to 980,668.80, 1,353,240 and 550,915.20 is: 760,216.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,668.80 : 1,353,240 = 550,915.20 : x
  2. Step 2: Convert to fraction form
    980,668.80/1,353,240 = 550,915.20/x
  3. Step 3: Cross multiply
    980,668.80x = 1,353,240 × 550,915.20
  4. Step 4: Simplify right side
    980,668.80x = 745,520,485,248.00
  5. Step 5: Solve for x
    x = 745,520,485,248.00/980,668.80
  6. Step 6: Final answer
    x = 760,216.38

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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.