Home / 921,600.72-1,271,814.75-513,728.46

Finding the Fourth Proportional to 921,600.72, 1,271,814.75 and 513,728.46

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Solution

The fourth proportional to 921,600.72, 1,271,814.75 and 513,728.46 is: 708,948.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,600.72 : 1,271,814.75 = 513,728.46 : x
  2. Step 2: Convert to fraction form
    921,600.72/1,271,814.75 = 513,728.46/x
  3. Step 3: Cross multiply
    921,600.72x = 1,271,814.75 × 513,728.46
  4. Step 4: Simplify right side
    921,600.72x = 653,367,432,922.79
  5. Step 5: Solve for x
    x = 653,367,432,922.79/921,600.72
  6. Step 6: Final answer
    x = 708,948.48

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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.