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Finding the Fourth Proportional to 478,657.03, 660,290.11 and 306,389.65

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Solution

The fourth proportional to 478,657.03, 660,290.11 and 306,389.65 is: 422,653.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,657.03 : 660,290.11 = 306,389.65 : x
  2. Step 2: Convert to fraction form
    478,657.03/660,290.11 = 306,389.65/x
  3. Step 3: Cross multiply
    478,657.03x = 660,290.11 × 306,389.65
  4. Step 4: Simplify right side
    478,657.03x = 202,306,054,389.08
  5. Step 5: Solve for x
    x = 202,306,054,389.08/478,657.03
  6. Step 6: Final answer
    x = 422,653.47

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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.