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Finding the Fourth Proportional to 280,670.16, 387,324.36 and 153,345.72

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Solution

The fourth proportional to 280,670.16, 387,324.36 and 153,345.72 is: 211,616.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,670.16 : 387,324.36 = 153,345.72 : x
  2. Step 2: Convert to fraction form
    280,670.16/387,324.36 = 153,345.72/x
  3. Step 3: Cross multiply
    280,670.16x = 387,324.36 × 153,345.72
  4. Step 4: Simplify right side
    280,670.16x = 59,394,532,857.74
  5. Step 5: Solve for x
    x = 59,394,532,857.74/280,670.16
  6. Step 6: Final answer
    x = 211,616.84

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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.