Home / 280,428.26-386,988.98-153,103.85

Finding the Fourth Proportional to 280,428.26, 386,988.98 and 153,103.85

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Solution

The fourth proportional to 280,428.26, 386,988.98 and 153,103.85 is: 211,282.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,428.26 : 386,988.98 = 153,103.85 : x
  2. Step 2: Convert to fraction form
    280,428.26/386,988.98 = 153,103.85/x
  3. Step 3: Cross multiply
    280,428.26x = 386,988.98 × 153,103.85
  4. Step 4: Simplify right side
    280,428.26x = 59,249,500,045.11
  5. Step 5: Solve for x
    x = 59,249,500,045.11/280,428.26
  6. Step 6: Final answer
    x = 211,282.20

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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.