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Finding the Fourth Proportional to 638,042.16, 880,560.21 and 476,616.93

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Solution

The fourth proportional to 638,042.16, 880,560.21 and 476,616.93 is: 657,777.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,042.16 : 880,560.21 = 476,616.93 : x
  2. Step 2: Convert to fraction form
    638,042.16/880,560.21 = 476,616.93/x
  3. Step 3: Cross multiply
    638,042.16x = 880,560.21 × 476,616.93
  4. Step 4: Simplify right side
    638,042.16x = 419,689,903,970.36
  5. Step 5: Solve for x
    x = 419,689,903,970.36/638,042.16
  6. Step 6: Final answer
    x = 657,777.70

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Double scale
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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.