Home / 660,738.75-911,742.12-388,746.83

Finding the Fourth Proportional to 660,738.75, 911,742.12 and 388,746.83

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Solution

The fourth proportional to 660,738.75, 911,742.12 and 388,746.83 is: 536,425.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,738.75 : 911,742.12 = 388,746.83 : x
  2. Step 2: Convert to fraction form
    660,738.75/911,742.12 = 388,746.83/x
  3. Step 3: Cross multiply
    660,738.75x = 911,742.12 × 388,746.83
  4. Step 4: Simplify right side
    660,738.75x = 354,436,854,368.77
  5. Step 5: Solve for x
    x = 354,436,854,368.77/660,738.75
  6. Step 6: Final answer
    x = 536,425.11

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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.