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Finding the Fourth Proportional to 290,802.80, 407,400.40 and 290,802.80

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Solution

The fourth proportional to 290,802.80, 407,400.40 and 290,802.80 is: 407,400.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,802.80 : 407,400.40 = 290,802.80 : x
  2. Step 2: Convert to fraction form
    290,802.80/407,400.40 = 290,802.80/x
  3. Step 3: Cross multiply
    290,802.80x = 407,400.40 × 290,802.80
  4. Step 4: Simplify right side
    290,802.80x = 118,473,177,041.12
  5. Step 5: Solve for x
    x = 118,473,177,041.12/290,802.80
  6. Step 6: Final answer
    x = 407,400.40

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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.