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Finding the Fourth Proportional to 557,549.21, 769,479.50 and 312,557.52

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Solution

The fourth proportional to 557,549.21, 769,479.50 and 312,557.52 is: 431,363.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,549.21 : 769,479.50 = 312,557.52 : x
  2. Step 2: Convert to fraction form
    557,549.21/769,479.50 = 312,557.52/x
  3. Step 3: Cross multiply
    557,549.21x = 769,479.50 × 312,557.52
  4. Step 4: Simplify right side
    557,549.21x = 240,506,602,648.05
  5. Step 5: Solve for x
    x = 240,506,602,648.05/557,549.21
  6. Step 6: Final answer
    x = 431,363.91

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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.