Home / 718,742,573.76-991,864,744.11-388,717,712.76

Finding the Fourth Proportional to 718,742,573.76, 991,864,744.11 and 388,717,712.76

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Solution

The fourth proportional to 718,742,573.76, 991,864,744.11 and 388,717,712.76 is: 536,430,439.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,742,573.76 : 991,864,744.11 = 388,717,712.76 : x
  2. Step 2: Convert to fraction form
    718,742,573.76/991,864,744.11 = 388,717,712.76/x
  3. Step 3: Cross multiply
    718,742,573.76x = 991,864,744.11 × 388,717,712.76
  4. Step 4: Simplify right side
    718,742,573.76x = 385,555,394,697,721,856
  5. Step 5: Solve for x
    x = 385,555,394,697,721,856/718,742,573.76
  6. Step 6: Final answer
    x = 536,430,439.46

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Double scale
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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.