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Finding the Fourth Proportional to 287,406.40, 430,904.80 and 109,844.80

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Solution

The fourth proportional to 287,406.40, 430,904.80 and 109,844.80 is: 164,688.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,406.40 : 430,904.80 = 109,844.80 : x
  2. Step 2: Convert to fraction form
    287,406.40/430,904.80 = 109,844.80/x
  3. Step 3: Cross multiply
    287,406.40x = 430,904.80 × 109,844.80
  4. Step 4: Simplify right side
    287,406.40x = 47,332,651,575.04
  5. Step 5: Solve for x
    x = 47,332,651,575.04/287,406.40
  6. Step 6: Final answer
    x = 164,688.93

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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.