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Finding the Fourth Proportional to 623,437.92, 860,327.06 and 351,503.40

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Solution

The fourth proportional to 623,437.92, 860,327.06 and 351,503.40 is: 485,064.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,437.92 : 860,327.06 = 351,503.40 : x
  2. Step 2: Convert to fraction form
    623,437.92/860,327.06 = 351,503.40/x
  3. Step 3: Cross multiply
    623,437.92x = 860,327.06 × 351,503.40
  4. Step 4: Simplify right side
    623,437.92x = 302,407,886,702.00
  5. Step 5: Solve for x
    x = 302,407,886,702.00/623,437.92
  6. Step 6: Final answer
    x = 485,064.96

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Double scale
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Similar ratio
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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.