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Finding the Fourth Proportional to 287,003.40, 430,310.70 and 146,646.60

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Solution

The fourth proportional to 287,003.40, 430,310.70 and 146,646.60 is: 219,870.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,003.40 : 430,310.70 = 146,646.60 : x
  2. Step 2: Convert to fraction form
    287,003.40/430,310.70 = 146,646.60/x
  3. Step 3: Cross multiply
    287,003.40x = 430,310.70 × 146,646.60
  4. Step 4: Simplify right side
    287,003.40x = 63,103,601,098.62
  5. Step 5: Solve for x
    x = 63,103,601,098.62/287,003.40
  6. Step 6: Final answer
    x = 219,870.57

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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.