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Finding the Fourth Proportional to 520,015.41, 717,842.28 and 316,131.46

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Solution

The fourth proportional to 520,015.41, 717,842.28 and 316,131.46 is: 436,395.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,015.41 : 717,842.28 = 316,131.46 : x
  2. Step 2: Convert to fraction form
    520,015.41/717,842.28 = 316,131.46/x
  3. Step 3: Cross multiply
    520,015.41x = 717,842.28 × 316,131.46
  4. Step 4: Simplify right side
    520,015.41x = 226,932,527,417.02
  5. Step 5: Solve for x
    x = 226,932,527,417.02/520,015.41
  6. Step 6: Final answer
    x = 436,395.77

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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.