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Finding the Fourth Proportional to 657,860.78, 907,869.84 and 403,162.76

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Solution

The fourth proportional to 657,860.78, 907,869.84 and 403,162.76 is: 556,378.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,860.78 : 907,869.84 = 403,162.76 : x
  2. Step 2: Convert to fraction form
    657,860.78/907,869.84 = 403,162.76/x
  3. Step 3: Cross multiply
    657,860.78x = 907,869.84 × 403,162.76
  4. Step 4: Simplify right side
    657,860.78x = 366,019,310,415.16
  5. Step 5: Solve for x
    x = 366,019,310,415.16/657,860.78
  6. Step 6: Final answer
    x = 556,378.07

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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.