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Finding the Fourth Proportional to 280,670.94, 387,331.47 and 153,354.42

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Solution

The fourth proportional to 280,670.94, 387,331.47 and 153,354.42 is: 211,632.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,670.94 : 387,331.47 = 153,354.42 : x
  2. Step 2: Convert to fraction form
    280,670.94/387,331.47 = 153,354.42/x
  3. Step 3: Cross multiply
    280,670.94x = 387,331.47 × 153,354.42
  4. Step 4: Simplify right side
    280,670.94x = 59,398,992,929.60
  5. Step 5: Solve for x
    x = 59,398,992,929.60/280,670.94
  6. Step 6: Final answer
    x = 211,632.14

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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.