Home / 643,356.95-965,666.91-537,421.40

Finding the Fourth Proportional to 643,356.95, 965,666.91 and 537,421.40

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Solution

The fourth proportional to 643,356.95, 965,666.91 and 537,421.40 is: 806,659.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,356.95 : 965,666.91 = 537,421.40 : x
  2. Step 2: Convert to fraction form
    643,356.95/965,666.91 = 537,421.40/x
  3. Step 3: Cross multiply
    643,356.95x = 965,666.91 × 537,421.40
  4. Step 4: Simplify right side
    643,356.95x = 518,970,063,514.12
  5. Step 5: Solve for x
    x = 518,970,063,514.12/643,356.95
  6. Step 6: Final answer
    x = 806,659.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.