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Finding the Fourth Proportional to 939,136.90, 1,316,657.90 and 939,136.90

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Solution

The fourth proportional to 939,136.90, 1,316,657.90 and 939,136.90 is: 1,316,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,136.90 : 1,316,657.90 = 939,136.90 : x
  2. Step 2: Convert to fraction form
    939,136.90/1,316,657.90 = 939,136.90/x
  3. Step 3: Cross multiply
    939,136.90x = 1,316,657.90 × 939,136.90
  4. Step 4: Simplify right side
    939,136.90x = 1,236,522,018,566.51
  5. Step 5: Solve for x
    x = 1,236,522,018,566.51/939,136.90
  6. Step 6: Final answer
    x = 1,316,657.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.