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Finding the Fourth Proportional to 620,148.80, 930,223.20 and 480,180.80

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Solution

The fourth proportional to 620,148.80, 930,223.20 and 480,180.80 is: 720,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,148.80 : 930,223.20 = 480,180.80 : x
  2. Step 2: Convert to fraction form
    620,148.80/930,223.20 = 480,180.80/x
  3. Step 3: Cross multiply
    620,148.80x = 930,223.20 × 480,180.80
  4. Step 4: Simplify right side
    620,148.80x = 446,675,320,354.56
  5. Step 5: Solve for x
    x = 446,675,320,354.56/620,148.80
  6. Step 6: Final answer
    x = 720,271.20

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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.