Home / 280,329.17-386,829.30-156,140.64

Finding the Fourth Proportional to 280,329.17, 386,829.30 and 156,140.64

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Solution

The fourth proportional to 280,329.17, 386,829.30 and 156,140.64 is: 215,460.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,329.17 : 386,829.30 = 156,140.64 : x
  2. Step 2: Convert to fraction form
    280,329.17/386,829.30 = 156,140.64/x
  3. Step 3: Cross multiply
    280,329.17x = 386,829.30 × 156,140.64
  4. Step 4: Simplify right side
    280,329.17x = 60,399,772,666.88
  5. Step 5: Solve for x
    x = 60,399,772,666.88/280,329.17
  6. Step 6: Final answer
    x = 215,460.18

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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.