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Finding the Fourth Proportional to 520,075.10, 780,112.65 and 240,139.10

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Solution

The fourth proportional to 520,075.10, 780,112.65 and 240,139.10 is: 360,208.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,075.10 : 780,112.65 = 240,139.10 : x
  2. Step 2: Convert to fraction form
    520,075.10/780,112.65 = 240,139.10/x
  3. Step 3: Cross multiply
    520,075.10x = 780,112.65 × 240,139.10
  4. Step 4: Simplify right side
    520,075.10x = 187,335,549,669.62
  5. Step 5: Solve for x
    x = 187,335,549,669.62/520,075.10
  6. Step 6: Final answer
    x = 360,208.65

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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.