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Finding the Fourth Proportional to 520,015.80, 780,242.40 and 283,528.20

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Solution

The fourth proportional to 520,015.80, 780,242.40 and 283,528.20 is: 425,411.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,015.80 : 780,242.40 = 283,528.20 : x
  2. Step 2: Convert to fraction form
    520,015.80/780,242.40 = 283,528.20/x
  3. Step 3: Cross multiply
    520,015.80x = 780,242.40 × 283,528.20
  4. Step 4: Simplify right side
    520,015.80x = 221,220,723,235.68
  5. Step 5: Solve for x
    x = 221,220,723,235.68/520,015.80
  6. Step 6: Final answer
    x = 425,411.54

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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.