Home / 679,135.20-1,018,702.80-621,074.40

Finding the Fourth Proportional to 679,135.20, 1,018,702.80 and 621,074.40

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Solution

The fourth proportional to 679,135.20, 1,018,702.80 and 621,074.40 is: 931,611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,135.20 : 1,018,702.80 = 621,074.40 : x
  2. Step 2: Convert to fraction form
    679,135.20/1,018,702.80 = 621,074.40/x
  3. Step 3: Cross multiply
    679,135.20x = 1,018,702.80 × 621,074.40
  4. Step 4: Simplify right side
    679,135.20x = 632,690,230,288.32
  5. Step 5: Solve for x
    x = 632,690,230,288.32/679,135.20
  6. Step 6: Final answer
    x = 931,611.60

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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.