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Finding the Fourth Proportional to 520,374.36, 780,685.78 and 165,389.03

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Solution

The fourth proportional to 520,374.36, 780,685.78 and 165,389.03 is: 248,123.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,374.36 : 780,685.78 = 165,389.03 : x
  2. Step 2: Convert to fraction form
    520,374.36/780,685.78 = 165,389.03/x
  3. Step 3: Cross multiply
    520,374.36x = 780,685.78 × 165,389.03
  4. Step 4: Simplify right side
    520,374.36x = 129,116,863,888.99
  5. Step 5: Solve for x
    x = 129,116,863,888.99/520,374.36
  6. Step 6: Final answer
    x = 248,123.03

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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.