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Finding the Fourth Proportional to 285,045.54, 393,362.88 and 155,984.04

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Solution

The fourth proportional to 285,045.54, 393,362.88 and 155,984.04 is: 215,257.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,045.54 : 393,362.88 = 155,984.04 : x
  2. Step 2: Convert to fraction form
    285,045.54/393,362.88 = 155,984.04/x
  3. Step 3: Cross multiply
    285,045.54x = 393,362.88 × 155,984.04
  4. Step 4: Simplify right side
    285,045.54x = 61,358,331,208.44
  5. Step 5: Solve for x
    x = 61,358,331,208.44/285,045.54
  6. Step 6: Final answer
    x = 215,257.99

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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.