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Finding the Fourth Proportional to 610,861.60, 916,511.10 and 255,984.40

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Solution

The fourth proportional to 610,861.60, 916,511.10 and 255,984.40 is: 384,068.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,861.60 : 916,511.10 = 255,984.40 : x
  2. Step 2: Convert to fraction form
    610,861.60/916,511.10 = 255,984.40/x
  3. Step 3: Cross multiply
    610,861.60x = 916,511.10 × 255,984.40
  4. Step 4: Simplify right side
    610,861.60x = 234,612,544,026.84
  5. Step 5: Solve for x
    x = 234,612,544,026.84/610,861.60
  6. Step 6: Final answer
    x = 384,068.25

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Double scale
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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.