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Finding the Fourth Proportional to 658,886.40, 909,257.40 and 372,405.60

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Solution

The fourth proportional to 658,886.40, 909,257.40 and 372,405.60 is: 513,916.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,886.40 : 909,257.40 = 372,405.60 : x
  2. Step 2: Convert to fraction form
    658,886.40/909,257.40 = 372,405.60/x
  3. Step 3: Cross multiply
    658,886.40x = 909,257.40 × 372,405.60
  4. Step 4: Simplify right side
    658,886.40x = 338,612,547,601.44
  5. Step 5: Solve for x
    x = 338,612,547,601.44/658,886.40
  6. Step 6: Final answer
    x = 513,916.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.