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Finding the Fourth Proportional to 620,835.30, 857,062.76 and 406,303.09

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Solution

The fourth proportional to 620,835.30, 857,062.76 and 406,303.09 is: 560,901.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,835.30 : 857,062.76 = 406,303.09 : x
  2. Step 2: Convert to fraction form
    620,835.30/857,062.76 = 406,303.09/x
  3. Step 3: Cross multiply
    620,835.30x = 857,062.76 × 406,303.09
  4. Step 4: Simplify right side
    620,835.30x = 348,227,243,537.76
  5. Step 5: Solve for x
    x = 348,227,243,537.76/620,835.30
  6. Step 6: Final answer
    x = 560,901.17

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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.