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Finding the Fourth Proportional to 738,995.20, 1,108,492.80 and 265,728.40

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Solution

The fourth proportional to 738,995.20, 1,108,492.80 and 265,728.40 is: 398,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,995.20 : 1,108,492.80 = 265,728.40 : x
  2. Step 2: Convert to fraction form
    738,995.20/1,108,492.80 = 265,728.40/x
  3. Step 3: Cross multiply
    738,995.20x = 1,108,492.80 × 265,728.40
  4. Step 4: Simplify right side
    738,995.20x = 294,558,018,155.52
  5. Step 5: Solve for x
    x = 294,558,018,155.52/738,995.20
  6. Step 6: Final answer
    x = 398,592.60

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.