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Finding the Fourth Proportional to 720,148.32, 993,800.88 and 397,880.64

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Solution

The fourth proportional to 720,148.32, 993,800.88 and 397,880.64 is: 549,073.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,148.32 : 993,800.88 = 397,880.64 : x
  2. Step 2: Convert to fraction form
    720,148.32/993,800.88 = 397,880.64/x
  3. Step 3: Cross multiply
    720,148.32x = 993,800.88 × 397,880.64
  4. Step 4: Simplify right side
    720,148.32x = 395,414,130,166.96
  5. Step 5: Solve for x
    x = 395,414,130,166.96/720,148.32
  6. Step 6: Final answer
    x = 549,073.18

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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.