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Finding the Fourth Proportional to 612,656.29, 919,108.99 and 213,328.20

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Solution

The fourth proportional to 612,656.29, 919,108.99 and 213,328.20 is: 320,035.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,656.29 : 919,108.99 = 213,328.20 : x
  2. Step 2: Convert to fraction form
    612,656.29/919,108.99 = 213,328.20/x
  3. Step 3: Cross multiply
    612,656.29x = 919,108.99 × 213,328.20
  4. Step 4: Simplify right side
    612,656.29x = 196,071,866,440.52
  5. Step 5: Solve for x
    x = 196,071,866,440.52/612,656.29
  6. Step 6: Final answer
    x = 320,035.67

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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.