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Finding the Fourth Proportional to 520,075.70, 778,385.55 and 377,515.70

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Solution

The fourth proportional to 520,075.70, 778,385.55 and 377,515.70 is: 565,019.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,075.70 : 778,385.55 = 377,515.70 : x
  2. Step 2: Convert to fraction form
    520,075.70/778,385.55 = 377,515.70/x
  3. Step 3: Cross multiply
    520,075.70x = 778,385.55 × 377,515.70
  4. Step 4: Simplify right side
    520,075.70x = 293,852,765,778.14
  5. Step 5: Solve for x
    x = 293,852,765,778.14/520,075.70
  6. Step 6: Final answer
    x = 565,019.22

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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.