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Finding the Fourth Proportional to 620,123.20, 930,184.80 and 578,132.80

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Solution

The fourth proportional to 620,123.20, 930,184.80 and 578,132.80 is: 867,199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,123.20 : 930,184.80 = 578,132.80 : x
  2. Step 2: Convert to fraction form
    620,123.20/930,184.80 = 578,132.80/x
  3. Step 3: Cross multiply
    620,123.20x = 930,184.80 × 578,132.80
  4. Step 4: Simplify right side
    620,123.20x = 537,770,342,941.44
  5. Step 5: Solve for x
    x = 537,770,342,941.44/620,123.20
  6. Step 6: Final answer
    x = 867,199.20

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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.