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Finding the Fourth Proportional to 286,484.80, 395,348.95 and 157,431.60

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Solution

The fourth proportional to 286,484.80, 395,348.95 and 157,431.60 is: 217,255.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,484.80 : 395,348.95 = 157,431.60 : x
  2. Step 2: Convert to fraction form
    286,484.80/395,348.95 = 157,431.60/x
  3. Step 3: Cross multiply
    286,484.80x = 395,348.95 × 157,431.60
  4. Step 4: Simplify right side
    286,484.80x = 62,240,417,756.82
  5. Step 5: Solve for x
    x = 62,240,417,756.82/286,484.80
  6. Step 6: Final answer
    x = 217,255.57

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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.