Home / 921,342.80-1,271,435.81-513,435.67

Finding the Fourth Proportional to 921,342.80, 1,271,435.81 and 513,435.67

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Solution

The fourth proportional to 921,342.80, 1,271,435.81 and 513,435.67 is: 708,531.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,342.80 : 1,271,435.81 = 513,435.67 : x
  2. Step 2: Convert to fraction form
    921,342.80/1,271,435.81 = 513,435.67/x
  3. Step 3: Cross multiply
    921,342.80x = 1,271,435.81 × 513,435.67
  4. Step 4: Simplify right side
    921,342.80x = 652,800,491,223.58
  5. Step 5: Solve for x
    x = 652,800,491,223.58/921,342.80
  6. Step 6: Final answer
    x = 708,531.60

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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.