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Finding the Fourth Proportional to 520,076.20, 780,114.30 and 240,140.20

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Solution

The fourth proportional to 520,076.20, 780,114.30 and 240,140.20 is: 360,210.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,076.20 : 780,114.30 = 240,140.20 : x
  2. Step 2: Convert to fraction form
    520,076.20/780,114.30 = 240,140.20/x
  3. Step 3: Cross multiply
    520,076.20x = 780,114.30 × 240,140.20
  4. Step 4: Simplify right side
    520,076.20x = 187,336,804,024.86
  5. Step 5: Solve for x
    x = 187,336,804,024.86/520,076.20
  6. Step 6: Final answer
    x = 360,210.30

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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.