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Finding the Fourth Proportional to 887.81, 1,225.23 and 514.90

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Solution

The fourth proportional to 887.81, 1,225.23 and 514.90 is: 710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.81 : 1,225.23 = 514.90 : x
  2. Step 2: Convert to fraction form
    887.81/1,225.23 = 514.90/x
  3. Step 3: Cross multiply
    887.81x = 1,225.23 × 514.90
  4. Step 4: Simplify right side
    887.81x = 630,870.53
  5. Step 5: Solve for x
    x = 630,870.53/887.81
  6. Step 6: Final answer
    x = 710.60

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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.