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Finding the Fourth Proportional to 458,813.60, 688,220.40 and 121,853.60

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Solution

The fourth proportional to 458,813.60, 688,220.40 and 121,853.60 is: 182,780.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,813.60 : 688,220.40 = 121,853.60 : x
  2. Step 2: Convert to fraction form
    458,813.60/688,220.40 = 121,853.60/x
  3. Step 3: Cross multiply
    458,813.60x = 688,220.40 × 121,853.60
  4. Step 4: Simplify right side
    458,813.60x = 83,862,133,333.44
  5. Step 5: Solve for x
    x = 83,862,133,333.44/458,813.60
  6. Step 6: Final answer
    x = 182,780.40

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Similar ratio
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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.