Home / 280,427.69-386,988.20-153,103.28

Finding the Fourth Proportional to 280,427.69, 386,988.20 and 153,103.28

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Solution

The fourth proportional to 280,427.69, 386,988.20 and 153,103.28 is: 211,281.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,427.69 : 386,988.20 = 153,103.28 : x
  2. Step 2: Convert to fraction form
    280,427.69/386,988.20 = 153,103.28/x
  3. Step 3: Cross multiply
    280,427.69x = 386,988.20 × 153,103.28
  4. Step 4: Simplify right side
    280,427.69x = 59,249,161,189.11
  5. Step 5: Solve for x
    x = 59,249,161,189.11/280,427.69
  6. Step 6: Final answer
    x = 211,281.43

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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.