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Finding the Fourth Proportional to 692,635.79, 956,161.35 and 402,190.78

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Solution

The fourth proportional to 692,635.79, 956,161.35 and 402,190.78 is: 555,211.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,635.79 : 956,161.35 = 402,190.78 : x
  2. Step 2: Convert to fraction form
    692,635.79/956,161.35 = 402,190.78/x
  3. Step 3: Cross multiply
    692,635.79x = 956,161.35 × 402,190.78
  4. Step 4: Simplify right side
    692,635.79x = 384,559,274,225.04
  5. Step 5: Solve for x
    x = 384,559,274,225.04/692,635.79
  6. Step 6: Final answer
    x = 555,211.38

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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.