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Finding the Fourth Proportional to 614.76, 848.87 and 419.15

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Solution

The fourth proportional to 614.76, 848.87 and 419.15 is: 578.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.76 : 848.87 = 419.15 : x
  2. Step 2: Convert to fraction form
    614.76/848.87 = 419.15/x
  3. Step 3: Cross multiply
    614.76x = 848.87 × 419.15
  4. Step 4: Simplify right side
    614.76x = 355,797.52
  5. Step 5: Solve for x
    x = 355,797.52/614.76
  6. Step 6: Final answer
    x = 578.76

Related Problems

Find fourth proportional to 307.38, 424.43 and 209.57
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Double scale
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Similar ratio
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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.