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Finding the Fourth Proportional to 520,731.40, 779,282.70 and 310,520.20

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Solution

The fourth proportional to 520,731.40, 779,282.70 and 310,520.20 is: 464,698.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,731.40 : 779,282.70 = 310,520.20 : x
  2. Step 2: Convert to fraction form
    520,731.40/779,282.70 = 310,520.20/x
  3. Step 3: Cross multiply
    520,731.40x = 779,282.70 × 310,520.20
  4. Step 4: Simplify right side
    520,731.40x = 241,983,019,860.54
  5. Step 5: Solve for x
    x = 241,983,019,860.54/520,731.40
  6. Step 6: Final answer
    x = 464,698.35

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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.