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Finding the Fourth Proportional to 440.19, 607.48 and 243.72

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Solution

The fourth proportional to 440.19, 607.48 and 243.72 is: 336.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.19 : 607.48 = 243.72 : x
  2. Step 2: Convert to fraction form
    440.19/607.48 = 243.72/x
  3. Step 3: Cross multiply
    440.19x = 607.48 × 243.72
  4. Step 4: Simplify right side
    440.19x = 148,054.42
  5. Step 5: Solve for x
    x = 148,054.42/440.19
  6. Step 6: Final answer
    x = 336.34

Related Problems

Find fourth proportional to 220.10, 303.74 and 121.86
Half scale
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Double scale
Find fourth proportional to 441.19, 608.86 and 244.72
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.