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Finding the Fourth Proportional to 528,141.36, 728,815.41 and 313,152.78

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Solution

The fourth proportional to 528,141.36, 728,815.41 and 313,152.78 is: 432,139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,141.36 : 728,815.41 = 313,152.78 : x
  2. Step 2: Convert to fraction form
    528,141.36/728,815.41 = 313,152.78/x
  3. Step 3: Cross multiply
    528,141.36x = 728,815.41 × 313,152.78
  4. Step 4: Simplify right side
    528,141.36x = 228,230,571,748.34
  5. Step 5: Solve for x
    x = 228,230,571,748.34/528,141.36
  6. Step 6: Final answer
    x = 432,139.18

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1.5x scale

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.