Home / 1,223,287.75-1,688,137.10-686,743.75

Finding the Fourth Proportional to 1,223,287.75, 1,688,137.10 and 686,743.75

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Solution

The fourth proportional to 1,223,287.75, 1,688,137.10 and 686,743.75 is: 947,706.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,287.75 : 1,688,137.10 = 686,743.75 : x
  2. Step 2: Convert to fraction form
    1,223,287.75/1,688,137.10 = 686,743.75/x
  3. Step 3: Cross multiply
    1,223,287.75x = 1,688,137.10 × 686,743.75
  4. Step 4: Simplify right side
    1,223,287.75x = 1,159,317,602,568.13
  5. Step 5: Solve for x
    x = 1,159,317,602,568.13/1,223,287.75
  6. Step 6: Final answer
    x = 947,706.38

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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.