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Finding the Fourth Proportional to 656,760.64, 906,309.12 and 385,009.53

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Solution

The fourth proportional to 656,760.64, 906,309.12 and 385,009.53 is: 531,301.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,760.64 : 906,309.12 = 385,009.53 : x
  2. Step 2: Convert to fraction form
    656,760.64/906,309.12 = 385,009.53/x
  3. Step 3: Cross multiply
    656,760.64x = 906,309.12 × 385,009.53
  4. Step 4: Simplify right side
    656,760.64x = 348,937,648,325.91
  5. Step 5: Solve for x
    x = 348,937,648,325.91/656,760.64
  6. Step 6: Final answer
    x = 531,301.10

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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.