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Finding the Fourth Proportional to 371,915.29, 513,490.26 and 285,720.76

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Solution

The fourth proportional to 371,915.29, 513,490.26 and 285,720.76 is: 394,484.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,915.29 : 513,490.26 = 285,720.76 : x
  2. Step 2: Convert to fraction form
    371,915.29/513,490.26 = 285,720.76/x
  3. Step 3: Cross multiply
    371,915.29x = 513,490.26 × 285,720.76
  4. Step 4: Simplify right side
    371,915.29x = 146,714,827,339.80
  5. Step 5: Solve for x
    x = 146,714,827,339.80/371,915.29
  6. Step 6: Final answer
    x = 394,484.53

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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.