Home / 515,445.30-711,350.02-289,105.38

Finding the Fourth Proportional to 515,445.30, 711,350.02 and 289,105.38

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Solution

The fourth proportional to 515,445.30, 711,350.02 and 289,105.38 is: 398,985.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,445.30 : 711,350.02 = 289,105.38 : x
  2. Step 2: Convert to fraction form
    515,445.30/711,350.02 = 289,105.38/x
  3. Step 3: Cross multiply
    515,445.30x = 711,350.02 × 289,105.38
  4. Step 4: Simplify right side
    515,445.30x = 205,655,117,845.11
  5. Step 5: Solve for x
    x = 205,655,117,845.11/515,445.30
  6. Step 6: Final answer
    x = 398,985.34

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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.