Home / 520,057.10-780,085.65-436,076.30

Finding the Fourth Proportional to 520,057.10, 780,085.65 and 436,076.30

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Solution

The fourth proportional to 520,057.10, 780,085.65 and 436,076.30 is: 654,114.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,057.10 : 780,085.65 = 436,076.30 : x
  2. Step 2: Convert to fraction form
    520,057.10/780,085.65 = 436,076.30/x
  3. Step 3: Cross multiply
    520,057.10x = 780,085.65 × 436,076.30
  4. Step 4: Simplify right side
    520,057.10x = 340,176,863,935.10
  5. Step 5: Solve for x
    x = 340,176,863,935.10/520,057.10
  6. Step 6: Final answer
    x = 654,114.45

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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.