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Finding the Fourth Proportional to 682,312.40, 941,570.70 and 380,506.40

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Solution

The fourth proportional to 682,312.40, 941,570.70 and 380,506.40 is: 525,087.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    682,312.40 : 941,570.70 = 380,506.40 : x
  2. Step 2: Convert to fraction form
    682,312.40/941,570.70 = 380,506.40/x
  3. Step 3: Cross multiply
    682,312.40x = 941,570.70 × 380,506.40
  4. Step 4: Simplify right side
    682,312.40x = 358,273,677,402.48
  5. Step 5: Solve for x
    x = 358,273,677,402.48/682,312.40
  6. Step 6: Final answer
    x = 525,087.45

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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.