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Finding the Fourth Proportional to 830.84, 1,145.49 and 568.40

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Solution

The fourth proportional to 830.84, 1,145.49 and 568.40 is: 783.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.84 : 1,145.49 = 568.40 : x
  2. Step 2: Convert to fraction form
    830.84/1,145.49 = 568.40/x
  3. Step 3: Cross multiply
    830.84x = 1,145.49 × 568.40
  4. Step 4: Simplify right side
    830.84x = 651,096.52
  5. Step 5: Solve for x
    x = 651,096.52/830.84
  6. Step 6: Final answer
    x = 783.66

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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.