Home / 768,311,475.48-1,059,216,140.34-485,913,166.20

Finding the Fourth Proportional to 768,311,475.48, 1,059,216,140.34 and 485,913,166.20

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Solution

The fourth proportional to 768,311,475.48, 1,059,216,140.34 and 485,913,166.20 is: 669,893,766.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,311,475.48 : 1,059,216,140.34 = 485,913,166.20 : x
  2. Step 2: Convert to fraction form
    768,311,475.48/1,059,216,140.34 = 485,913,166.20/x
  3. Step 3: Cross multiply
    768,311,475.48x = 1,059,216,140.34 × 485,913,166.20
  4. Step 4: Simplify right side
    768,311,475.48x = 514,687,068,442,752,960
  5. Step 5: Solve for x
    x = 514,687,068,442,752,960/768,311,475.48
  6. Step 6: Final answer
    x = 669,893,766.88

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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.