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Finding the Fourth Proportional to 1,685.58, 2,528 and 530.70

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Solution

The fourth proportional to 1,685.58, 2,528 and 530.70 is: 795.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,685.58 : 2,528 = 530.70 : x
  2. Step 2: Convert to fraction form
    1,685.58/2,528 = 530.70/x
  3. Step 3: Cross multiply
    1,685.58x = 2,528 × 530.70
  4. Step 4: Simplify right side
    1,685.58x = 1,341,609.60
  5. Step 5: Solve for x
    x = 1,341,609.60/1,685.58
  6. Step 6: Final answer
    x = 795.93

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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.