Home / 280,428.75-386,989.67-153,104.34

Finding the Fourth Proportional to 280,428.75, 386,989.67 and 153,104.34

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Solution

The fourth proportional to 280,428.75, 386,989.67 and 153,104.34 is: 211,282.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,428.75 : 386,989.67 = 153,104.34 : x
  2. Step 2: Convert to fraction form
    280,428.75/386,989.67 = 153,104.34/x
  3. Step 3: Cross multiply
    280,428.75x = 386,989.67 × 153,104.34
  4. Step 4: Simplify right side
    280,428.75x = 59,249,798,012.17
  5. Step 5: Solve for x
    x = 59,249,798,012.17/280,428.75
  6. Step 6: Final answer
    x = 211,282.89

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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.