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Finding the Fourth Proportional to 425,341.80, 638,963.10 and 355,357.80

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Solution

The fourth proportional to 425,341.80, 638,963.10 and 355,357.80 is: 533,830.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,341.80 : 638,963.10 = 355,357.80 : x
  2. Step 2: Convert to fraction form
    425,341.80/638,963.10 = 355,357.80/x
  3. Step 3: Cross multiply
    425,341.80x = 638,963.10 × 355,357.80
  4. Step 4: Simplify right side
    425,341.80x = 227,060,521,497.18
  5. Step 5: Solve for x
    x = 227,060,521,497.18/425,341.80
  6. Step 6: Final answer
    x = 533,830.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.