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Finding the Fourth Proportional to 571,696.80, 788,990.08 and 317,130

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Solution

The fourth proportional to 571,696.80, 788,990.08 and 317,130 is: 437,666.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,696.80 : 788,990.08 = 317,130 : x
  2. Step 2: Convert to fraction form
    571,696.80/788,990.08 = 317,130/x
  3. Step 3: Cross multiply
    571,696.80x = 788,990.08 × 317,130
  4. Step 4: Simplify right side
    571,696.80x = 250,212,424,070.40
  5. Step 5: Solve for x
    x = 250,212,424,070.40/571,696.80
  6. Step 6: Final answer
    x = 437,666.30

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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.