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Finding the Fourth Proportional to 657,742.76, 907,685 and 355,936.76

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Solution

The fourth proportional to 657,742.76, 907,685 and 355,936.76 is: 491,192.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,742.76 : 907,685 = 355,936.76 : x
  2. Step 2: Convert to fraction form
    657,742.76/907,685 = 355,936.76/x
  3. Step 3: Cross multiply
    657,742.76x = 907,685 × 355,936.76
  4. Step 4: Simplify right side
    657,742.76x = 323,078,458,000.60
  5. Step 5: Solve for x
    x = 323,078,458,000.60/657,742.76
  6. Step 6: Final answer
    x = 491,192.72

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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.