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Finding the Fourth Proportional to 438,725.10, 605,384.98 and 257,370.86

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Solution

The fourth proportional to 438,725.10, 605,384.98 and 257,370.86 is: 355,139.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,725.10 : 605,384.98 = 257,370.86 : x
  2. Step 2: Convert to fraction form
    438,725.10/605,384.98 = 257,370.86/x
  3. Step 3: Cross multiply
    438,725.10x = 605,384.98 × 257,370.86
  4. Step 4: Simplify right side
    438,725.10x = 155,808,451,533.52
  5. Step 5: Solve for x
    x = 155,808,451,533.52/438,725.10
  6. Step 6: Final answer
    x = 355,139.13

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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.