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Finding the Fourth Proportional to 670,642.12, 925,408.50 and 384,145.12

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Solution

The fourth proportional to 670,642.12, 925,408.50 and 384,145.12 is: 530,075.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,642.12 : 925,408.50 = 384,145.12 : x
  2. Step 2: Convert to fraction form
    670,642.12/925,408.50 = 384,145.12/x
  3. Step 3: Cross multiply
    670,642.12x = 925,408.50 × 384,145.12
  4. Step 4: Simplify right side
    670,642.12x = 355,491,159,281.52
  5. Step 5: Solve for x
    x = 355,491,159,281.52/670,642.12
  6. Step 6: Final answer
    x = 530,075.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.