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Finding the Fourth Proportional to 557,991.72, 770,088.79 and 316,248.35

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Solution

The fourth proportional to 557,991.72, 770,088.79 and 316,248.35 is: 436,456.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,991.72 : 770,088.79 = 316,248.35 : x
  2. Step 2: Convert to fraction form
    557,991.72/770,088.79 = 316,248.35/x
  3. Step 3: Cross multiply
    557,991.72x = 770,088.79 × 316,248.35
  4. Step 4: Simplify right side
    557,991.72x = 243,539,310,957.06
  5. Step 5: Solve for x
    x = 243,539,310,957.06/557,991.72
  6. Step 6: Final answer
    x = 436,456.85

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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.