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Finding the Fourth Proportional to 520,678.77, 718,603.26 and 291,248.80

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Solution

The fourth proportional to 520,678.77, 718,603.26 and 291,248.80 is: 401,960.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,678.77 : 718,603.26 = 291,248.80 : x
  2. Step 2: Convert to fraction form
    520,678.77/718,603.26 = 291,248.80/x
  3. Step 3: Cross multiply
    520,678.77x = 718,603.26 × 291,248.80
  4. Step 4: Simplify right side
    520,678.77x = 209,292,337,151.09
  5. Step 5: Solve for x
    x = 209,292,337,151.09/520,678.77
  6. Step 6: Final answer
    x = 401,960.57

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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.