Home / 280,148.16-386,636.85-155,981.64

Finding the Fourth Proportional to 280,148.16, 386,636.85 and 155,981.64

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Solution

The fourth proportional to 280,148.16, 386,636.85 and 155,981.64 is: 215,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,148.16 : 386,636.85 = 155,981.64 : x
  2. Step 2: Convert to fraction form
    280,148.16/386,636.85 = 155,981.64/x
  3. Step 3: Cross multiply
    280,148.16x = 386,636.85 × 155,981.64
  4. Step 4: Simplify right side
    280,148.16x = 60,308,249,947.43
  5. Step 5: Solve for x
    x = 60,308,249,947.43/280,148.16
  6. Step 6: Final answer
    x = 215,272.70

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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.