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Finding the Fourth Proportional to 587,140.17, 810,239.70 and 345,438.30

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Solution

The fourth proportional to 587,140.17, 810,239.70 and 345,438.30 is: 476,696.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,140.17 : 810,239.70 = 345,438.30 : x
  2. Step 2: Convert to fraction form
    587,140.17/810,239.70 = 345,438.30/x
  3. Step 3: Cross multiply
    587,140.17x = 810,239.70 × 345,438.30
  4. Step 4: Simplify right side
    587,140.17x = 279,887,824,560.51
  5. Step 5: Solve for x
    x = 279,887,824,560.51/587,140.17
  6. Step 6: Final answer
    x = 476,696.77

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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.