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Finding the Fourth Proportional to 377,064.90, 520,321.80 and 215,915.79

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Solution

The fourth proportional to 377,064.90, 520,321.80 and 215,915.79 is: 297,947.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,064.90 : 520,321.80 = 215,915.79 : x
  2. Step 2: Convert to fraction form
    377,064.90/520,321.80 = 215,915.79/x
  3. Step 3: Cross multiply
    377,064.90x = 520,321.80 × 215,915.79
  4. Step 4: Simplify right side
    377,064.90x = 112,345,692,501.22
  5. Step 5: Solve for x
    x = 112,345,692,501.22/377,064.90
  6. Step 6: Final answer
    x = 297,947.89

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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.