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Finding the Fourth Proportional to 520,076.40, 780,373.80 and 295,609.20

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Solution

The fourth proportional to 520,076.40, 780,373.80 and 295,609.20 is: 443,561.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,076.40 : 780,373.80 = 295,609.20 : x
  2. Step 2: Convert to fraction form
    520,076.40/780,373.80 = 295,609.20/x
  3. Step 3: Cross multiply
    520,076.40x = 780,373.80 × 295,609.20
  4. Step 4: Simplify right side
    520,076.40x = 230,685,674,718.96
  5. Step 5: Solve for x
    x = 230,685,674,718.96/520,076.40
  6. Step 6: Final answer
    x = 443,561.13

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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.