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Finding the Fourth Proportional to 287,026.84, 430,637.55 and 127,080.71

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Solution

The fourth proportional to 287,026.84, 430,637.55 and 127,080.71 is: 190,664.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,026.84 : 430,637.55 = 127,080.71 : x
  2. Step 2: Convert to fraction form
    287,026.84/430,637.55 = 127,080.71/x
  3. Step 3: Cross multiply
    287,026.84x = 430,637.55 × 127,080.71
  4. Step 4: Simplify right side
    287,026.84x = 54,725,726,683.25
  5. Step 5: Solve for x
    x = 54,725,726,683.25/287,026.84
  6. Step 6: Final answer
    x = 190,664.15

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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.