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Finding the Fourth Proportional to 818.90, 1,130.72 and 524.67

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Solution

The fourth proportional to 818.90, 1,130.72 and 524.67 is: 724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.90 : 1,130.72 = 524.67 : x
  2. Step 2: Convert to fraction form
    818.90/1,130.72 = 524.67/x
  3. Step 3: Cross multiply
    818.90x = 1,130.72 × 524.67
  4. Step 4: Simplify right side
    818.90x = 593,254.86
  5. Step 5: Solve for x
    x = 593,254.86/818.90
  6. Step 6: Final answer
    x = 724.45

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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.