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Finding the Fourth Proportional to 342,357.48, 472,398.21 and 215,205.30

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Solution

The fourth proportional to 342,357.48, 472,398.21 and 215,205.30 is: 296,948.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,357.48 : 472,398.21 = 215,205.30 : x
  2. Step 2: Convert to fraction form
    342,357.48/472,398.21 = 215,205.30/x
  3. Step 3: Cross multiply
    342,357.48x = 472,398.21 × 215,205.30
  4. Step 4: Simplify right side
    342,357.48x = 101,662,598,502.51
  5. Step 5: Solve for x
    x = 101,662,598,502.51/342,357.48
  6. Step 6: Final answer
    x = 296,948.67

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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.