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Finding the Fourth Proportional to 280,636.84, 387,280.20 and 153,314.56

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Solution

The fourth proportional to 280,636.84, 387,280.20 and 153,314.56 is: 211,574.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,636.84 : 387,280.20 = 153,314.56 : x
  2. Step 2: Convert to fraction form
    280,636.84/387,280.20 = 153,314.56/x
  3. Step 3: Cross multiply
    280,636.84x = 387,280.20 × 153,314.56
  4. Step 4: Simplify right side
    280,636.84x = 59,375,693,459.71
  5. Step 5: Solve for x
    x = 59,375,693,459.71/280,636.84
  6. Step 6: Final answer
    x = 211,574.84

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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.