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Finding the Fourth Proportional to 528,631.16, 729,179.18 and 313,619

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Solution

The fourth proportional to 528,631.16, 729,179.18 and 313,619 is: 432,597.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,631.16 : 729,179.18 = 313,619 : x
  2. Step 2: Convert to fraction form
    528,631.16/729,179.18 = 313,619/x
  3. Step 3: Cross multiply
    528,631.16x = 729,179.18 × 313,619
  4. Step 4: Simplify right side
    528,631.16x = 228,684,445,252.42
  5. Step 5: Solve for x
    x = 228,684,445,252.42/528,631.16
  6. Step 6: Final answer
    x = 432,597.36

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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.