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Finding the Fourth Proportional to 913,136, 1,260,132 and 510,728

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Solution

The fourth proportional to 913,136, 1,260,132 and 510,728 is: 704,807.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,136 : 1,260,132 = 510,728 : x
  2. Step 2: Convert to fraction form
    913,136/1,260,132 = 510,728/x
  3. Step 3: Cross multiply
    913,136x = 1,260,132 × 510,728
  4. Step 4: Simplify right side
    913,136x = 643,584,696,096
  5. Step 5: Solve for x
    x = 643,584,696,096/913,136
  6. Step 6: Final answer
    x = 704,807.06

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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.