Home / 778,978.20-1,168,985.70-442,018.20

Finding the Fourth Proportional to 778,978.20, 1,168,985.70 and 442,018.20

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Solution

The fourth proportional to 778,978.20, 1,168,985.70 and 442,018.20 is: 663,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,978.20 : 1,168,985.70 = 442,018.20 : x
  2. Step 2: Convert to fraction form
    778,978.20/1,168,985.70 = 442,018.20/x
  3. Step 3: Cross multiply
    778,978.20x = 1,168,985.70 × 442,018.20
  4. Step 4: Simplify right side
    778,978.20x = 516,712,954,939.74
  5. Step 5: Solve for x
    x = 516,712,954,939.74/778,978.20
  6. Step 6: Final answer
    x = 663,321.46

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1.5x scale

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.