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Finding the Fourth Proportional to 387,804.48, 581,706.89 and 121,585.74

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Solution

The fourth proportional to 387,804.48, 581,706.89 and 121,585.74 is: 182,378.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,804.48 : 581,706.89 = 121,585.74 : x
  2. Step 2: Convert to fraction form
    387,804.48/581,706.89 = 121,585.74/x
  3. Step 3: Cross multiply
    387,804.48x = 581,706.89 × 121,585.74
  4. Step 4: Simplify right side
    387,804.48x = 70,727,262,075.82
  5. Step 5: Solve for x
    x = 70,727,262,075.82/387,804.48
  6. Step 6: Final answer
    x = 182,378.66

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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.