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Finding the Fourth Proportional to 561,187.20, 774,246.24 and 319,409.28

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Solution

The fourth proportional to 561,187.20, 774,246.24 and 319,409.28 is: 440,675.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,187.20 : 774,246.24 = 319,409.28 : x
  2. Step 2: Convert to fraction form
    561,187.20/774,246.24 = 319,409.28/x
  3. Step 3: Cross multiply
    561,187.20x = 774,246.24 × 319,409.28
  4. Step 4: Simplify right side
    561,187.20x = 247,301,434,061.11
  5. Step 5: Solve for x
    x = 247,301,434,061.11/561,187.20
  6. Step 6: Final answer
    x = 440,675.47

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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.