Home / 431,038.20-646,557.30-164,807.40

Finding the Fourth Proportional to 431,038.20, 646,557.30 and 164,807.40

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Solution

The fourth proportional to 431,038.20, 646,557.30 and 164,807.40 is: 247,211.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,038.20 : 646,557.30 = 164,807.40 : x
  2. Step 2: Convert to fraction form
    431,038.20/646,557.30 = 164,807.40/x
  3. Step 3: Cross multiply
    431,038.20x = 646,557.30 × 164,807.40
  4. Step 4: Simplify right side
    431,038.20x = 106,557,427,564.02
  5. Step 5: Solve for x
    x = 106,557,427,564.02/431,038.20
  6. Step 6: Final answer
    x = 247,211.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.