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Finding the Fourth Proportional to 385,239.40, 578,515.20 and 273,702.40

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Solution

The fourth proportional to 385,239.40, 578,515.20 and 273,702.40 is: 411,019.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,239.40 : 578,515.20 = 273,702.40 : x
  2. Step 2: Convert to fraction form
    385,239.40/578,515.20 = 273,702.40/x
  3. Step 3: Cross multiply
    385,239.40x = 578,515.20 × 273,702.40
  4. Step 4: Simplify right side
    385,239.40x = 158,340,998,676.48
  5. Step 5: Solve for x
    x = 158,340,998,676.48/385,239.40
  6. Step 6: Final answer
    x = 411,019.74

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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.