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Finding the Fourth Proportional to 520,603.13, 718,485.32 and 316,668.12

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Solution

The fourth proportional to 520,603.13, 718,485.32 and 316,668.12 is: 437,034.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,603.13 : 718,485.32 = 316,668.12 : x
  2. Step 2: Convert to fraction form
    520,603.13/718,485.32 = 316,668.12/x
  3. Step 3: Cross multiply
    520,603.13x = 718,485.32 × 316,668.12
  4. Step 4: Simplify right side
    520,603.13x = 227,521,393,629.35
  5. Step 5: Solve for x
    x = 227,521,393,629.35/520,603.13
  6. Step 6: Final answer
    x = 437,034.24

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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.