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Finding the Fourth Proportional to 1,339,053.78, 1,848,459.71 and 904,060.40

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Solution

The fourth proportional to 1,339,053.78, 1,848,459.71 and 904,060.40 is: 1,247,985.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339,053.78 : 1,848,459.71 = 904,060.40 : x
  2. Step 2: Convert to fraction form
    1,339,053.78/1,848,459.71 = 904,060.40/x
  3. Step 3: Cross multiply
    1,339,053.78x = 1,848,459.71 × 904,060.40
  4. Step 4: Simplify right side
    1,339,053.78x = 1,671,119,215,945.62
  5. Step 5: Solve for x
    x = 1,671,119,215,945.62/1,339,053.78
  6. Step 6: Final answer
    x = 1,247,985.13

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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.