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Finding the Fourth Proportional to 553,351.86, 763,605.40 and 308,323.95

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Solution

The fourth proportional to 553,351.86, 763,605.40 and 308,323.95 is: 425,475.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,351.86 : 763,605.40 = 308,323.95 : x
  2. Step 2: Convert to fraction form
    553,351.86/763,605.40 = 308,323.95/x
  3. Step 3: Cross multiply
    553,351.86x = 763,605.40 × 308,323.95
  4. Step 4: Simplify right side
    553,351.86x = 235,437,837,088.21
  5. Step 5: Solve for x
    x = 235,437,837,088.21/553,351.86
  6. Step 6: Final answer
    x = 425,475.82

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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.