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Finding the Fourth Proportional to 571,006.78, 787,955.40 and 312,832.35

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Solution

The fourth proportional to 571,006.78, 787,955.40 and 312,832.35 is: 431,690.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,006.78 : 787,955.40 = 312,832.35 : x
  2. Step 2: Convert to fraction form
    571,006.78/787,955.40 = 312,832.35/x
  3. Step 3: Cross multiply
    571,006.78x = 787,955.40 × 312,832.35
  4. Step 4: Simplify right side
    571,006.78x = 246,497,939,477.19
  5. Step 5: Solve for x
    x = 246,497,939,477.19/571,006.78
  6. Step 6: Final answer
    x = 431,690.04

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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.