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Finding the Fourth Proportional to 661,723.32, 912,448.72 and 457,419.56

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Solution

The fourth proportional to 661,723.32, 912,448.72 and 457,419.56 is: 630,734.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,723.32 : 912,448.72 = 457,419.56 : x
  2. Step 2: Convert to fraction form
    661,723.32/912,448.72 = 457,419.56/x
  3. Step 3: Cross multiply
    661,723.32x = 912,448.72 × 457,419.56
  4. Step 4: Simplify right side
    661,723.32x = 417,371,892,024.96
  5. Step 5: Solve for x
    x = 417,371,892,024.96/661,723.32
  6. Step 6: Final answer
    x = 630,734.75

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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.