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Finding the Fourth Proportional to 1,238,801.60, 1,859,584.80 and 1,157,585.60

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Solution

The fourth proportional to 1,238,801.60, 1,859,584.80 and 1,157,585.60 is: 1,737,670.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,801.60 : 1,859,584.80 = 1,157,585.60 : x
  2. Step 2: Convert to fraction form
    1,238,801.60/1,859,584.80 = 1,157,585.60/x
  3. Step 3: Cross multiply
    1,238,801.60x = 1,859,584.80 × 1,157,585.60
  4. Step 4: Simplify right side
    1,238,801.60x = 2,152,628,586,458.88
  5. Step 5: Solve for x
    x = 2,152,628,586,458.88/1,238,801.60
  6. Step 6: Final answer
    x = 1,737,670.17

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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.