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Finding the Fourth Proportional to 517,240.20, 714,240 and 381,509.40

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Solution

The fourth proportional to 517,240.20, 714,240 and 381,509.40 is: 526,813.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,240.20 : 714,240 = 381,509.40 : x
  2. Step 2: Convert to fraction form
    517,240.20/714,240 = 381,509.40/x
  3. Step 3: Cross multiply
    517,240.20x = 714,240 × 381,509.40
  4. Step 4: Simplify right side
    517,240.20x = 272,489,273,856.00
  5. Step 5: Solve for x
    x = 272,489,273,856.00/517,240.20
  6. Step 6: Final answer
    x = 526,813.80

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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.