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Finding the Fourth Proportional to 614.77, 848.13 and 393.64

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Solution

The fourth proportional to 614.77, 848.13 and 393.64 is: 543.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.77 : 848.13 = 393.64 : x
  2. Step 2: Convert to fraction form
    614.77/848.13 = 393.64/x
  3. Step 3: Cross multiply
    614.77x = 848.13 × 393.64
  4. Step 4: Simplify right side
    614.77x = 333,853.65
  5. Step 5: Solve for x
    x = 333,853.65/614.77
  6. Step 6: Final answer
    x = 543.06

Related Problems

Find fourth proportional to 307.38, 424.07 and 196.82
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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.