Home / 760,403.76-1,049,390.28-420,871.92

Finding the Fourth Proportional to 760,403.76, 1,049,390.28 and 420,871.92

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Solution

The fourth proportional to 760,403.76, 1,049,390.28 and 420,871.92 is: 580,821.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,403.76 : 1,049,390.28 = 420,871.92 : x
  2. Step 2: Convert to fraction form
    760,403.76/1,049,390.28 = 420,871.92/x
  3. Step 3: Cross multiply
    760,403.76x = 1,049,390.28 × 420,871.92
  4. Step 4: Simplify right side
    760,403.76x = 441,658,901,972.94
  5. Step 5: Solve for x
    x = 441,658,901,972.94/760,403.76
  6. Step 6: Final answer
    x = 580,821.57

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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.