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Finding the Fourth Proportional to 490,699.10, 736,048.65 and 420,715.10

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Solution

The fourth proportional to 490,699.10, 736,048.65 and 420,715.10 is: 631,072.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,699.10 : 736,048.65 = 420,715.10 : x
  2. Step 2: Convert to fraction form
    490,699.10/736,048.65 = 420,715.10/x
  3. Step 3: Cross multiply
    490,699.10x = 736,048.65 × 420,715.10
  4. Step 4: Simplify right side
    490,699.10x = 309,666,781,389.62
  5. Step 5: Solve for x
    x = 309,666,781,389.62/490,699.10
  6. Step 6: Final answer
    x = 631,072.65

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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.