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Finding the Fourth Proportional to 524,640.80, 786,961.20 and 509,088.80

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Solution

The fourth proportional to 524,640.80, 786,961.20 and 509,088.80 is: 763,633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,640.80 : 786,961.20 = 509,088.80 : x
  2. Step 2: Convert to fraction form
    524,640.80/786,961.20 = 509,088.80/x
  3. Step 3: Cross multiply
    524,640.80x = 786,961.20 × 509,088.80
  4. Step 4: Simplify right side
    524,640.80x = 400,633,132,954.56
  5. Step 5: Solve for x
    x = 400,633,132,954.56/524,640.80
  6. Step 6: Final answer
    x = 763,633.20

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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.