Home / 921,628.72-1,271,853.44-513,756.48

Finding the Fourth Proportional to 921,628.72, 1,271,853.44 and 513,756.48

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Solution

The fourth proportional to 921,628.72, 1,271,853.44 and 513,756.48 is: 708,987.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,628.72 : 1,271,853.44 = 513,756.48 : x
  2. Step 2: Convert to fraction form
    921,628.72/1,271,853.44 = 513,756.48/x
  3. Step 3: Cross multiply
    921,628.72x = 1,271,853.44 × 513,756.48
  4. Step 4: Simplify right side
    921,628.72x = 653,422,946,410.29
  5. Step 5: Solve for x
    x = 653,422,946,410.29/921,628.72
  6. Step 6: Final answer
    x = 708,987.18

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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.