Home / 920,416.35-1,380,702.29-289,510.59

Finding the Fourth Proportional to 920,416.35, 1,380,702.29 and 289,510.59

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Solution

The fourth proportional to 920,416.35, 1,380,702.29 and 289,510.59 is: 434,290.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,416.35 : 1,380,702.29 = 289,510.59 : x
  2. Step 2: Convert to fraction form
    920,416.35/1,380,702.29 = 289,510.59/x
  3. Step 3: Cross multiply
    920,416.35x = 1,380,702.29 × 289,510.59
  4. Step 4: Simplify right side
    920,416.35x = 399,727,933,144.70
  5. Step 5: Solve for x
    x = 399,727,933,144.70/920,416.35
  6. Step 6: Final answer
    x = 434,290.34

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Half scale
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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.