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Finding the Fourth Proportional to 290,426.70, 407,012.10 and 290,426.70

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Solution

The fourth proportional to 290,426.70, 407,012.10 and 290,426.70 is: 407,012.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,426.70 : 407,012.10 = 290,426.70 : x
  2. Step 2: Convert to fraction form
    290,426.70/407,012.10 = 290,426.70/x
  3. Step 3: Cross multiply
    290,426.70x = 407,012.10 × 290,426.70
  4. Step 4: Simplify right side
    290,426.70x = 118,207,181,063.07
  5. Step 5: Solve for x
    x = 118,207,181,063.07/290,426.70
  6. Step 6: Final answer
    x = 407,012.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.