Home / 715,919.55-987,950.02-389,222.25

Finding the Fourth Proportional to 715,919.55, 987,950.02 and 389,222.25

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Solution

The fourth proportional to 715,919.55, 987,950.02 and 389,222.25 is: 537,116.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,919.55 : 987,950.02 = 389,222.25 : x
  2. Step 2: Convert to fraction form
    715,919.55/987,950.02 = 389,222.25/x
  3. Step 3: Cross multiply
    715,919.55x = 987,950.02 × 389,222.25
  4. Step 4: Simplify right side
    715,919.55x = 384,532,129,671.95
  5. Step 5: Solve for x
    x = 384,532,129,671.95/715,919.55
  6. Step 6: Final answer
    x = 537,116.40

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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.