Home / 921,128.70-1,271,106.90-507,584.04

Finding the Fourth Proportional to 921,128.70, 1,271,106.90 and 507,584.04

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Solution

The fourth proportional to 921,128.70, 1,271,106.90 and 507,584.04 is: 700,438.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,128.70 : 1,271,106.90 = 507,584.04 : x
  2. Step 2: Convert to fraction form
    921,128.70/1,271,106.90 = 507,584.04/x
  3. Step 3: Cross multiply
    921,128.70x = 1,271,106.90 × 507,584.04
  4. Step 4: Simplify right side
    921,128.70x = 645,193,575,573.88
  5. Step 5: Solve for x
    x = 645,193,575,573.88/921,128.70
  6. Step 6: Final answer
    x = 700,438.03

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.