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Finding the Fourth Proportional to 628,738.77, 867,659.61 and 342,261.03

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Solution

The fourth proportional to 628,738.77, 867,659.61 and 342,261.03 is: 472,320.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,738.77 : 867,659.61 = 342,261.03 : x
  2. Step 2: Convert to fraction form
    628,738.77/867,659.61 = 342,261.03/x
  3. Step 3: Cross multiply
    628,738.77x = 867,659.61 × 342,261.03
  4. Step 4: Simplify right side
    628,738.77x = 296,966,071,808.00
  5. Step 5: Solve for x
    x = 296,966,071,808.00/628,738.77
  6. Step 6: Final answer
    x = 472,320.28

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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.