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Finding the Fourth Proportional to 1,155,897.83, 1,734,531.70 and 643,991.43

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Solution

The fourth proportional to 1,155,897.83, 1,734,531.70 and 643,991.43 is: 966,368.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155,897.83 : 1,734,531.70 = 643,991.43 : x
  2. Step 2: Convert to fraction form
    1,155,897.83/1,734,531.70 = 643,991.43/x
  3. Step 3: Cross multiply
    1,155,897.83x = 1,734,531.70 × 643,991.43
  4. Step 4: Simplify right side
    1,155,897.83x = 1,117,023,559,464.38
  5. Step 5: Solve for x
    x = 1,117,023,559,464.38/1,155,897.83
  6. Step 6: Final answer
    x = 966,368.77

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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.