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Finding the Fourth Proportional to 306,987.84, 420,574.89 and 295,482.40

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Solution

The fourth proportional to 306,987.84, 420,574.89 and 295,482.40 is: 404,812.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,987.84 : 420,574.89 = 295,482.40 : x
  2. Step 2: Convert to fraction form
    306,987.84/420,574.89 = 295,482.40/x
  3. Step 3: Cross multiply
    306,987.84x = 420,574.89 × 295,482.40
  4. Step 4: Simplify right side
    306,987.84x = 124,272,477,876.94
  5. Step 5: Solve for x
    x = 124,272,477,876.94/306,987.84
  6. Step 6: Final answer
    x = 404,812.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.