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Finding the Fourth Proportional to 621,702.60, 933,245.10 and 385,312.20

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Solution

The fourth proportional to 621,702.60, 933,245.10 and 385,312.20 is: 578,396.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,702.60 : 933,245.10 = 385,312.20 : x
  2. Step 2: Convert to fraction form
    621,702.60/933,245.10 = 385,312.20/x
  3. Step 3: Cross multiply
    621,702.60x = 933,245.10 × 385,312.20
  4. Step 4: Simplify right side
    621,702.60x = 359,590,722,620.22
  5. Step 5: Solve for x
    x = 359,590,722,620.22/621,702.60
  6. Step 6: Final answer
    x = 578,396.68

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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.