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Finding the Fourth Proportional to 515,292.66, 711,111.24 and 311,315.22

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Solution

The fourth proportional to 515,292.66, 711,111.24 and 311,315.22 is: 429,619.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,292.66 : 711,111.24 = 311,315.22 : x
  2. Step 2: Convert to fraction form
    515,292.66/711,111.24 = 311,315.22/x
  3. Step 3: Cross multiply
    515,292.66x = 711,111.24 × 311,315.22
  4. Step 4: Simplify right side
    515,292.66x = 221,379,752,125.07
  5. Step 5: Solve for x
    x = 221,379,752,125.07/515,292.66
  6. Step 6: Final answer
    x = 429,619.46

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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.