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Finding the Fourth Proportional to 290,424.70, 407,009.30 and 290,424.70

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Solution

The fourth proportional to 290,424.70, 407,009.30 and 290,424.70 is: 407,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,424.70 : 407,009.30 = 290,424.70 : x
  2. Step 2: Convert to fraction form
    290,424.70/407,009.30 = 290,424.70/x
  3. Step 3: Cross multiply
    290,424.70x = 407,009.30 × 290,424.70
  4. Step 4: Simplify right side
    290,424.70x = 118,205,553,849.71
  5. Step 5: Solve for x
    x = 118,205,553,849.71/290,424.70
  6. Step 6: Final answer
    x = 407,009.30

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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.