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Finding the Fourth Proportional to 515,368.48, 772,735.20 and 178,330.72

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Solution

The fourth proportional to 515,368.48, 772,735.20 and 178,330.72 is: 267,386.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,368.48 : 772,735.20 = 178,330.72 : x
  2. Step 2: Convert to fraction form
    515,368.48/772,735.20 = 178,330.72/x
  3. Step 3: Cross multiply
    515,368.48x = 772,735.20 × 178,330.72
  4. Step 4: Simplify right side
    515,368.48x = 137,802,424,585.34
  5. Step 5: Solve for x
    x = 137,802,424,585.34/515,368.48
  6. Step 6: Final answer
    x = 267,386.21

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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.