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Finding the Fourth Proportional to 520,068.35, 780,102.53 and 253,999.55

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Solution

The fourth proportional to 520,068.35, 780,102.53 and 253,999.55 is: 380,999.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,068.35 : 780,102.53 = 253,999.55 : x
  2. Step 2: Convert to fraction form
    520,068.35/780,102.53 = 253,999.55/x
  3. Step 3: Cross multiply
    520,068.35x = 780,102.53 × 253,999.55
  4. Step 4: Simplify right side
    520,068.35x = 198,145,690,303.86
  5. Step 5: Solve for x
    x = 198,145,690,303.86/520,068.35
  6. Step 6: Final answer
    x = 380,999.33

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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.