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Finding the Fourth Proportional to 872,001.80, 1,307,030.70 and 339,345.80

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Solution

The fourth proportional to 872,001.80, 1,307,030.70 and 339,345.80 is: 508,640.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,001.80 : 1,307,030.70 = 339,345.80 : x
  2. Step 2: Convert to fraction form
    872,001.80/1,307,030.70 = 339,345.80/x
  3. Step 3: Cross multiply
    872,001.80x = 1,307,030.70 × 339,345.80
  4. Step 4: Simplify right side
    872,001.80x = 443,535,378,516.06
  5. Step 5: Solve for x
    x = 443,535,378,516.06/872,001.80
  6. Step 6: Final answer
    x = 508,640.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.