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Finding the Fourth Proportional to 520,072.70, 780,109.05 and 298,888.70

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Solution

The fourth proportional to 520,072.70, 780,109.05 and 298,888.70 is: 448,333.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,072.70 : 780,109.05 = 298,888.70 : x
  2. Step 2: Convert to fraction form
    520,072.70/780,109.05 = 298,888.70/x
  3. Step 3: Cross multiply
    520,072.70x = 780,109.05 × 298,888.70
  4. Step 4: Simplify right side
    520,072.70x = 233,165,779,812.74
  5. Step 5: Solve for x
    x = 233,165,779,812.74/520,072.70
  6. Step 6: Final answer
    x = 448,333.05

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Similar ratio
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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.