Home / 743,117.79-1,025,565.80-420,885.21

Finding the Fourth Proportional to 743,117.79, 1,025,565.80 and 420,885.21

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Solution

The fourth proportional to 743,117.79, 1,025,565.80 and 420,885.21 is: 580,857.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,117.79 : 1,025,565.80 = 420,885.21 : x
  2. Step 2: Convert to fraction form
    743,117.79/1,025,565.80 = 420,885.21/x
  3. Step 3: Cross multiply
    743,117.79x = 1,025,565.80 × 420,885.21
  4. Step 4: Simplify right side
    743,117.79x = 431,645,477,101.82
  5. Step 5: Solve for x
    x = 431,645,477,101.82/743,117.79
  6. Step 6: Final answer
    x = 580,857.41

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Half scale
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Double scale
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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.