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Finding the Fourth Proportional to 620,415.40, 930,623.10 and 495,999.40

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Solution

The fourth proportional to 620,415.40, 930,623.10 and 495,999.40 is: 743,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,415.40 : 930,623.10 = 495,999.40 : x
  2. Step 2: Convert to fraction form
    620,415.40/930,623.10 = 495,999.40/x
  3. Step 3: Cross multiply
    620,415.40x = 930,623.10 × 495,999.40
  4. Step 4: Simplify right side
    620,415.40x = 461,588,499,226.14
  5. Step 5: Solve for x
    x = 461,588,499,226.14/620,415.40
  6. Step 6: Final answer
    x = 743,999.10

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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.