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Finding the Fourth Proportional to 840.98, 1,261.10 and 293.08

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Solution

The fourth proportional to 840.98, 1,261.10 and 293.08 is: 439.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.98 : 1,261.10 = 293.08 : x
  2. Step 2: Convert to fraction form
    840.98/1,261.10 = 293.08/x
  3. Step 3: Cross multiply
    840.98x = 1,261.10 × 293.08
  4. Step 4: Simplify right side
    840.98x = 369,603.19
  5. Step 5: Solve for x
    x = 369,603.19/840.98
  6. Step 6: Final answer
    x = 439.49

Related Problems

Find fourth proportional to 420.49, 630.55 and 146.54
Half scale
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Double scale
Find fourth proportional to 841.98, 1,262.60 and 294.08
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.