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Finding the Fourth Proportional to 530.42, 795.54 and 145.68

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Solution

The fourth proportional to 530.42, 795.54 and 145.68 is: 218.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.42 : 795.54 = 145.68 : x
  2. Step 2: Convert to fraction form
    530.42/795.54 = 145.68/x
  3. Step 3: Cross multiply
    530.42x = 795.54 × 145.68
  4. Step 4: Simplify right side
    530.42x = 115,894.27
  5. Step 5: Solve for x
    x = 115,894.27/530.42
  6. Step 6: Final answer
    x = 218.50

Related Problems

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Double scale
Find fourth proportional to 531.42, 797.04 and 146.68
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.