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Finding the Fourth Proportional to 607.18, 837.87 and 345.19

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Solution

The fourth proportional to 607.18, 837.87 and 345.19 is: 476.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.18 : 837.87 = 345.19 : x
  2. Step 2: Convert to fraction form
    607.18/837.87 = 345.19/x
  3. Step 3: Cross multiply
    607.18x = 837.87 × 345.19
  4. Step 4: Simplify right side
    607.18x = 289,224.35
  5. Step 5: Solve for x
    x = 289,224.35/607.18
  6. Step 6: Final answer
    x = 476.34

Related Problems

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Half scale
Find fourth proportional to 1,214.36, 1,675.74 and 690.38
Double scale
Find fourth proportional to 608.18, 839.25 and 346.19
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.