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Finding the Fourth Proportional to 478,719.36, 660,389.76 and 365,345.28

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Solution

The fourth proportional to 478,719.36, 660,389.76 and 365,345.28 is: 503,991.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,719.36 : 660,389.76 = 365,345.28 : x
  2. Step 2: Convert to fraction form
    478,719.36/660,389.76 = 365,345.28/x
  3. Step 3: Cross multiply
    478,719.36x = 660,389.76 × 365,345.28
  4. Step 4: Simplify right side
    478,719.36x = 241,270,281,776.33
  5. Step 5: Solve for x
    x = 241,270,281,776.33/478,719.36
  6. Step 6: Final answer
    x = 503,991.07

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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.