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Finding the Fourth Proportional to 676,407.36, 931,317.72 and 574,221

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Solution

The fourth proportional to 676,407.36, 931,317.72 and 574,221 is: 790,621.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,407.36 : 931,317.72 = 574,221 : x
  2. Step 2: Convert to fraction form
    676,407.36/931,317.72 = 574,221/x
  3. Step 3: Cross multiply
    676,407.36x = 931,317.72 × 574,221
  4. Step 4: Simplify right side
    676,407.36x = 534,782,192,496.12
  5. Step 5: Solve for x
    x = 534,782,192,496.12/676,407.36
  6. Step 6: Final answer
    x = 790,621.49

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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.