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Finding the Fourth Proportional to 628,669.40, 867,683.40 and 356,762.57

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Solution

The fourth proportional to 628,669.40, 867,683.40 and 356,762.57 is: 492,400.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,669.40 : 867,683.40 = 356,762.57 : x
  2. Step 2: Convert to fraction form
    628,669.40/867,683.40 = 356,762.57/x
  3. Step 3: Cross multiply
    628,669.40x = 867,683.40 × 356,762.57
  4. Step 4: Simplify right side
    628,669.40x = 309,556,959,730.34
  5. Step 5: Solve for x
    x = 309,556,959,730.34/628,669.40
  6. Step 6: Final answer
    x = 492,400.23

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1.5x scale

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.