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Finding the Fourth Proportional to 676,405.36, 931,314.88 and 574,219

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Solution

The fourth proportional to 676,405.36, 931,314.88 and 574,219 is: 790,618.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,405.36 : 931,314.88 = 574,219 : x
  2. Step 2: Convert to fraction form
    676,405.36/931,314.88 = 574,219/x
  3. Step 3: Cross multiply
    676,405.36x = 931,314.88 × 574,219
  4. Step 4: Simplify right side
    676,405.36x = 534,778,699,078.72
  5. Step 5: Solve for x
    x = 534,778,699,078.72/676,405.36
  6. Step 6: Final answer
    x = 790,618.66

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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.