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Finding the Fourth Proportional to 287,285.63, 430,928.44 and 90,293.63

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Solution

The fourth proportional to 287,285.63, 430,928.44 and 90,293.63 is: 135,440.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,285.63 : 430,928.44 = 90,293.63 : x
  2. Step 2: Convert to fraction form
    287,285.63/430,928.44 = 90,293.63/x
  3. Step 3: Cross multiply
    287,285.63x = 430,928.44 × 90,293.63
  4. Step 4: Simplify right side
    287,285.63x = 38,910,090,737.46
  5. Step 5: Solve for x
    x = 38,910,090,737.46/287,285.63
  6. Step 6: Final answer
    x = 135,440.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.