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Finding the Fourth Proportional to 657,301.56, 986,360.58 and 420,813.96

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Solution

The fourth proportional to 657,301.56, 986,360.58 and 420,813.96 is: 631,482.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,301.56 : 986,360.58 = 420,813.96 : x
  2. Step 2: Convert to fraction form
    657,301.56/986,360.58 = 420,813.96/x
  3. Step 3: Cross multiply
    657,301.56x = 986,360.58 × 420,813.96
  4. Step 4: Simplify right side
    657,301.56x = 415,074,301,657.70
  5. Step 5: Solve for x
    x = 415,074,301,657.70/657,301.56
  6. Step 6: Final answer
    x = 631,482.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.