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Finding the Fourth Proportional to 589.47, 813.40 and 340.75

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Solution

The fourth proportional to 589.47, 813.40 and 340.75 is: 470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.47 : 813.40 = 340.75 : x
  2. Step 2: Convert to fraction form
    589.47/813.40 = 340.75/x
  3. Step 3: Cross multiply
    589.47x = 813.40 × 340.75
  4. Step 4: Simplify right side
    589.47x = 277,168.13
  5. Step 5: Solve for x
    x = 277,168.13/589.47
  6. Step 6: Final answer
    x = 470.20

Related Problems

Find fourth proportional to 294.73, 406.70 and 170.38
Half scale
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Double scale
Find fourth proportional to 590.47, 814.78 and 341.75
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.