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Finding the Fourth Proportional to 692,558, 955,788.40 and 390,810.32

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Solution

The fourth proportional to 692,558, 955,788.40 and 390,810.32 is: 539,351.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,558 : 955,788.40 = 390,810.32 : x
  2. Step 2: Convert to fraction form
    692,558/955,788.40 = 390,810.32/x
  3. Step 3: Cross multiply
    692,558x = 955,788.40 × 390,810.32
  4. Step 4: Simplify right side
    692,558x = 373,531,970,456.29
  5. Step 5: Solve for x
    x = 373,531,970,456.29/692,558
  6. Step 6: Final answer
    x = 539,351.17

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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.