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Finding the Fourth Proportional to 434.30, 654.35 and 393.22

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Solution

The fourth proportional to 434.30, 654.35 and 393.22 is: 592.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.30 : 654.35 = 393.22 : x
  2. Step 2: Convert to fraction form
    434.30/654.35 = 393.22/x
  3. Step 3: Cross multiply
    434.30x = 654.35 × 393.22
  4. Step 4: Simplify right side
    434.30x = 257,303.51
  5. Step 5: Solve for x
    x = 257,303.51/434.30
  6. Step 6: Final answer
    x = 592.46

Related Problems

Find fourth proportional to 217.15, 327.18 and 196.61
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Double scale
Find fourth proportional to 435.30, 655.86 and 394.22
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.