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Finding the Fourth Proportional to 530.40, 795.84 and 286.88

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Solution

The fourth proportional to 530.40, 795.84 and 286.88 is: 430.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.40 : 795.84 = 286.88 : x
  2. Step 2: Convert to fraction form
    530.40/795.84 = 286.88/x
  3. Step 3: Cross multiply
    530.40x = 795.84 × 286.88
  4. Step 4: Simplify right side
    530.40x = 228,310.58
  5. Step 5: Solve for x
    x = 228,310.58/530.40
  6. Step 6: Final answer
    x = 430.45

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Double scale
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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.