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Finding the Fourth Proportional to 620,598.40, 930,897.60 and 221,252.20

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Solution

The fourth proportional to 620,598.40, 930,897.60 and 221,252.20 is: 331,878.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,598.40 : 930,897.60 = 221,252.20 : x
  2. Step 2: Convert to fraction form
    620,598.40/930,897.60 = 221,252.20/x
  3. Step 3: Cross multiply
    620,598.40x = 930,897.60 × 221,252.20
  4. Step 4: Simplify right side
    620,598.40x = 205,963,141,974.72
  5. Step 5: Solve for x
    x = 205,963,141,974.72/620,598.40
  6. Step 6: Final answer
    x = 331,878.30

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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.