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Finding the Fourth Proportional to 257,360.80, 386,386.80 and 164,279.20

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Solution

The fourth proportional to 257,360.80, 386,386.80 and 164,279.20 is: 246,639.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,360.80 : 386,386.80 = 164,279.20 : x
  2. Step 2: Convert to fraction form
    257,360.80/386,386.80 = 164,279.20/x
  3. Step 3: Cross multiply
    257,360.80x = 386,386.80 × 164,279.20
  4. Step 4: Simplify right side
    257,360.80x = 63,475,314,394.56
  5. Step 5: Solve for x
    x = 63,475,314,394.56/257,360.80
  6. Step 6: Final answer
    x = 246,639.40

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1.5x scale

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.