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Finding the Fourth Proportional to 628,534.16, 867,396.70 and 356,613.51

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Solution

The fourth proportional to 628,534.16, 867,396.70 and 356,613.51 is: 492,137.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,534.16 : 867,396.70 = 356,613.51 : x
  2. Step 2: Convert to fraction form
    628,534.16/867,396.70 = 356,613.51/x
  3. Step 3: Cross multiply
    628,534.16x = 867,396.70 × 356,613.51
  4. Step 4: Simplify right side
    628,534.16x = 309,325,381,749.42
  5. Step 5: Solve for x
    x = 309,325,381,749.42/628,534.16
  6. Step 6: Final answer
    x = 492,137.74

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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.