Home / 728,400.86-1,005,531.63-518,983.76

Finding the Fourth Proportional to 728,400.86, 1,005,531.63 and 518,983.76

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Solution

The fourth proportional to 728,400.86, 1,005,531.63 and 518,983.76 is: 716,438.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,400.86 : 1,005,531.63 = 518,983.76 : x
  2. Step 2: Convert to fraction form
    728,400.86/1,005,531.63 = 518,983.76/x
  3. Step 3: Cross multiply
    728,400.86x = 1,005,531.63 × 518,983.76
  4. Step 4: Simplify right side
    728,400.86x = 521,854,581,108.67
  5. Step 5: Solve for x
    x = 521,854,581,108.67/728,400.86
  6. Step 6: Final answer
    x = 716,438.73

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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.