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Finding the Fourth Proportional to 692,605.80, 1,038,908.70 and 219,328.20

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Solution

The fourth proportional to 692,605.80, 1,038,908.70 and 219,328.20 is: 328,992.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,605.80 : 1,038,908.70 = 219,328.20 : x
  2. Step 2: Convert to fraction form
    692,605.80/1,038,908.70 = 219,328.20/x
  3. Step 3: Cross multiply
    692,605.80x = 1,038,908.70 × 219,328.20
  4. Step 4: Simplify right side
    692,605.80x = 227,861,975,135.34
  5. Step 5: Solve for x
    x = 227,861,975,135.34/692,605.80
  6. Step 6: Final answer
    x = 328,992.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.