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Finding the Fourth Proportional to 557,788.72, 769,718.90 and 316,074.18

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Solution

The fourth proportional to 557,788.72, 769,718.90 and 316,074.18 is: 436,165.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,788.72 : 769,718.90 = 316,074.18 : x
  2. Step 2: Convert to fraction form
    557,788.72/769,718.90 = 316,074.18/x
  3. Step 3: Cross multiply
    557,788.72x = 769,718.90 × 316,074.18
  4. Step 4: Simplify right side
    557,788.72x = 243,288,270,148.00
  5. Step 5: Solve for x
    x = 243,288,270,148.00/557,788.72
  6. Step 6: Final answer
    x = 436,165.63

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1.5x scale

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.