Home / 257,557.40-386,336.10-243,123.20

Finding the Fourth Proportional to 257,557.40, 386,336.10 and 243,123.20

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Solution

The fourth proportional to 257,557.40, 386,336.10 and 243,123.20 is: 364,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,557.40 : 386,336.10 = 243,123.20 : x
  2. Step 2: Convert to fraction form
    257,557.40/386,336.10 = 243,123.20/x
  3. Step 3: Cross multiply
    257,557.40x = 386,336.10 × 243,123.20
  4. Step 4: Simplify right side
    257,557.40x = 93,927,268,907.52
  5. Step 5: Solve for x
    x = 93,927,268,907.52/257,557.40
  6. Step 6: Final answer
    x = 364,684.80

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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.