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Finding the Fourth Proportional to 286,886.40, 395,912.88 and 157,830.48

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Solution

The fourth proportional to 286,886.40, 395,912.88 and 157,830.48 is: 217,811.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,886.40 : 395,912.88 = 157,830.48 : x
  2. Step 2: Convert to fraction form
    286,886.40/395,912.88 = 157,830.48/x
  3. Step 3: Cross multiply
    286,886.40x = 395,912.88 × 157,830.48
  4. Step 4: Simplify right side
    286,886.40x = 62,487,119,888.58
  5. Step 5: Solve for x
    x = 62,487,119,888.58/286,886.40
  6. Step 6: Final answer
    x = 217,811.37

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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.