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Finding the Fourth Proportional to 407,854.79, 562,855.58 and 279,063.39

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Solution

The fourth proportional to 407,854.79, 562,855.58 and 279,063.39 is: 385,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,854.79 : 562,855.58 = 279,063.39 : x
  2. Step 2: Convert to fraction form
    407,854.79/562,855.58 = 279,063.39/x
  3. Step 3: Cross multiply
    407,854.79x = 562,855.58 × 279,063.39
  4. Step 4: Simplify right side
    407,854.79x = 157,072,382,463.14
  5. Step 5: Solve for x
    x = 157,072,382,463.14/407,854.79
  6. Step 6: Final answer
    x = 385,118.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.