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Finding the Fourth Proportional to 555,719.70, 780,107.10 and 555,719.70

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Solution

The fourth proportional to 555,719.70, 780,107.10 and 555,719.70 is: 780,107.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,719.70 : 780,107.10 = 555,719.70 : x
  2. Step 2: Convert to fraction form
    555,719.70/780,107.10 = 555,719.70/x
  3. Step 3: Cross multiply
    555,719.70x = 780,107.10 × 555,719.70
  4. Step 4: Simplify right side
    555,719.70x = 433,520,883,579.87
  5. Step 5: Solve for x
    x = 433,520,883,579.87/555,719.70
  6. Step 6: Final answer
    x = 780,107.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.