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Finding the Fourth Proportional to 657,303.56, 986,363.58 and 420,815.96

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Solution

The fourth proportional to 657,303.56, 986,363.58 and 420,815.96 is: 631,485.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,303.56 : 986,363.58 = 420,815.96 : x
  2. Step 2: Convert to fraction form
    657,303.56/986,363.58 = 420,815.96/x
  3. Step 3: Cross multiply
    657,303.56x = 986,363.58 × 420,815.96
  4. Step 4: Simplify right side
    657,303.56x = 415,077,536,826.74
  5. Step 5: Solve for x
    x = 415,077,536,826.74/657,303.56
  6. Step 6: Final answer
    x = 631,485.30

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1.5x scale

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.