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Finding the Fourth Proportional to 280,613.91, 387,232.74 and 153,264.90

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Solution

The fourth proportional to 280,613.91, 387,232.74 and 153,264.90 is: 211,497.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,613.91 : 387,232.74 = 153,264.90 : x
  2. Step 2: Convert to fraction form
    280,613.91/387,232.74 = 153,264.90/x
  3. Step 3: Cross multiply
    280,613.91x = 387,232.74 × 153,264.90
  4. Step 4: Simplify right side
    280,613.91x = 59,349,187,172.83
  5. Step 5: Solve for x
    x = 59,349,187,172.83/280,613.91
  6. Step 6: Final answer
    x = 211,497.67

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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.