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Finding the Fourth Proportional to 662,587.20, 993,880.80 and 438,638.40

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Solution

The fourth proportional to 662,587.20, 993,880.80 and 438,638.40 is: 657,957.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,587.20 : 993,880.80 = 438,638.40 : x
  2. Step 2: Convert to fraction form
    662,587.20/993,880.80 = 438,638.40/x
  3. Step 3: Cross multiply
    662,587.20x = 993,880.80 × 438,638.40
  4. Step 4: Simplify right side
    662,587.20x = 435,954,283,902.72
  5. Step 5: Solve for x
    x = 435,954,283,902.72/662,587.20
  6. Step 6: Final answer
    x = 657,957.60

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.