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Finding the Fourth Proportional to 371,407.72, 513,023.45 and 307,136.58

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Solution

The fourth proportional to 371,407.72, 513,023.45 and 307,136.58 is: 424,246.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,407.72 : 513,023.45 = 307,136.58 : x
  2. Step 2: Convert to fraction form
    371,407.72/513,023.45 = 307,136.58/x
  3. Step 3: Cross multiply
    371,407.72x = 513,023.45 × 307,136.58
  4. Step 4: Simplify right side
    371,407.72x = 157,568,265,297.10
  5. Step 5: Solve for x
    x = 157,568,265,297.10/371,407.72
  6. Step 6: Final answer
    x = 424,246.07

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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.