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Finding the Fourth Proportional to 557,617.32, 769,518.90 and 302,972.76

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Solution

The fourth proportional to 557,617.32, 769,518.90 and 302,972.76 is: 418,106.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,617.32 : 769,518.90 = 302,972.76 : x
  2. Step 2: Convert to fraction form
    557,617.32/769,518.90 = 302,972.76/x
  3. Step 3: Cross multiply
    557,617.32x = 769,518.90 × 302,972.76
  4. Step 4: Simplify right side
    557,617.32x = 233,143,265,005.16
  5. Step 5: Solve for x
    x = 233,143,265,005.16/557,617.32
  6. Step 6: Final answer
    x = 418,106.21

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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.