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Finding the Fourth Proportional to 621,070.83, 857,111.49 and 345,457.80

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Solution

The fourth proportional to 621,070.83, 857,111.49 and 345,457.80 is: 476,750.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,070.83 : 857,111.49 = 345,457.80 : x
  2. Step 2: Convert to fraction form
    621,070.83/857,111.49 = 345,457.80/x
  3. Step 3: Cross multiply
    621,070.83x = 857,111.49 × 345,457.80
  4. Step 4: Simplify right side
    621,070.83x = 296,095,849,690.12
  5. Step 5: Solve for x
    x = 296,095,849,690.12/621,070.83
  6. Step 6: Final answer
    x = 476,750.53

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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.