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Finding the Fourth Proportional to 660,017.54, 910,666.50 and 401,891.42

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Solution

The fourth proportional to 660,017.54, 910,666.50 and 401,891.42 is: 554,514.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,017.54 : 910,666.50 = 401,891.42 : x
  2. Step 2: Convert to fraction form
    660,017.54/910,666.50 = 401,891.42/x
  3. Step 3: Cross multiply
    660,017.54x = 910,666.50 × 401,891.42
  4. Step 4: Simplify right side
    660,017.54x = 365,989,052,831.43
  5. Step 5: Solve for x
    x = 365,989,052,831.43/660,017.54
  6. Step 6: Final answer
    x = 554,514.13

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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.