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Finding the Fourth Proportional to 575,279.16, 793,261.80 and 391,636.50

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Solution

The fourth proportional to 575,279.16, 793,261.80 and 391,636.50 is: 540,033.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    575,279.16 : 793,261.80 = 391,636.50 : x
  2. Step 2: Convert to fraction form
    575,279.16/793,261.80 = 391,636.50/x
  3. Step 3: Cross multiply
    575,279.16x = 793,261.80 × 391,636.50
  4. Step 4: Simplify right side
    575,279.16x = 310,670,274,935.70
  5. Step 5: Solve for x
    x = 310,670,274,935.70/575,279.16
  6. Step 6: Final answer
    x = 540,033.95

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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.