Home / 920,531.20-1,380,796.80-289,638.40

Finding the Fourth Proportional to 920,531.20, 1,380,796.80 and 289,638.40

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Solution

The fourth proportional to 920,531.20, 1,380,796.80 and 289,638.40 is: 434,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,531.20 : 1,380,796.80 = 289,638.40 : x
  2. Step 2: Convert to fraction form
    920,531.20/1,380,796.80 = 289,638.40/x
  3. Step 3: Cross multiply
    920,531.20x = 1,380,796.80 × 289,638.40
  4. Step 4: Simplify right side
    920,531.20x = 399,931,775,877.12
  5. Step 5: Solve for x
    x = 399,931,775,877.12/920,531.20
  6. Step 6: Final answer
    x = 434,457.60

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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.