Home / 817,760.79-1,128,484.76-455,175.34

Finding the Fourth Proportional to 817,760.79, 1,128,484.76 and 455,175.34

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Solution

The fourth proportional to 817,760.79, 1,128,484.76 and 455,175.34 is: 628,127.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,760.79 : 1,128,484.76 = 455,175.34 : x
  2. Step 2: Convert to fraction form
    817,760.79/1,128,484.76 = 455,175.34/x
  3. Step 3: Cross multiply
    817,760.79x = 1,128,484.76 × 455,175.34
  4. Step 4: Simplify right side
    817,760.79x = 513,658,429,220.73
  5. Step 5: Solve for x
    x = 513,658,429,220.73/817,760.79
  6. Step 6: Final answer
    x = 628,127.98

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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.