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Finding the Fourth Proportional to 520,010.12, 717,605.20 and 290,571.12

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Solution

The fourth proportional to 520,010.12, 717,605.20 and 290,571.12 is: 400,983.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,010.12 : 717,605.20 = 290,571.12 : x
  2. Step 2: Convert to fraction form
    520,010.12/717,605.20 = 290,571.12/x
  3. Step 3: Cross multiply
    520,010.12x = 717,605.20 × 290,571.12
  4. Step 4: Simplify right side
    520,010.12x = 208,515,346,681.82
  5. Step 5: Solve for x
    x = 208,515,346,681.82/520,010.12
  6. Step 6: Final answer
    x = 400,983.25

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1.5x scale

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.