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Finding the Fourth Proportional to 528,179.52, 728,980.96 and 313,438

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Solution

The fourth proportional to 528,179.52, 728,980.96 and 313,438 is: 432,599.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,179.52 : 728,980.96 = 313,438 : x
  2. Step 2: Convert to fraction form
    528,179.52/728,980.96 = 313,438/x
  3. Step 3: Cross multiply
    528,179.52x = 728,980.96 × 313,438
  4. Step 4: Simplify right side
    528,179.52x = 228,490,334,140.48
  5. Step 5: Solve for x
    x = 228,490,334,140.48/528,179.52
  6. Step 6: Final answer
    x = 432,599.76

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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.