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Finding the Fourth Proportional to 286,846.84, 395,841.80 and 156,021.20

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Solution

The fourth proportional to 286,846.84, 395,841.80 and 156,021.20 is: 215,305.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,846.84 : 395,841.80 = 156,021.20 : x
  2. Step 2: Convert to fraction form
    286,846.84/395,841.80 = 156,021.20/x
  3. Step 3: Cross multiply
    286,846.84x = 395,841.80 × 156,021.20
  4. Step 4: Simplify right side
    286,846.84x = 61,759,712,646.16
  5. Step 5: Solve for x
    x = 61,759,712,646.16/286,846.84
  6. Step 6: Final answer
    x = 215,305.54

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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.