Home / 285,256.23-393,680-157,931.82

Finding the Fourth Proportional to 285,256.23, 393,680 and 157,931.82

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Solution

The fourth proportional to 285,256.23, 393,680 and 157,931.82 is: 217,960.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,256.23 : 393,680 = 157,931.82 : x
  2. Step 2: Convert to fraction form
    285,256.23/393,680 = 157,931.82/x
  3. Step 3: Cross multiply
    285,256.23x = 393,680 × 157,931.82
  4. Step 4: Simplify right side
    285,256.23x = 62,174,598,897.60
  5. Step 5: Solve for x
    x = 62,174,598,897.60/285,256.23
  6. Step 6: Final answer
    x = 217,960.53

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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.