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Finding the Fourth Proportional to 863,645.40, 1,191,776.90 and 476,465.81

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Solution

The fourth proportional to 863,645.40, 1,191,776.90 and 476,465.81 is: 657,493.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,645.40 : 1,191,776.90 = 476,465.81 : x
  2. Step 2: Convert to fraction form
    863,645.40/1,191,776.90 = 476,465.81/x
  3. Step 3: Cross multiply
    863,645.40x = 1,191,776.90 × 476,465.81
  4. Step 4: Simplify right side
    863,645.40x = 567,840,937,656.58
  5. Step 5: Solve for x
    x = 567,840,937,656.58/863,645.40
  6. Step 6: Final answer
    x = 657,493.15

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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.