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Finding the Fourth Proportional to 699,743.16, 965,666.86 and 397,980.60

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Solution

The fourth proportional to 699,743.16, 965,666.86 and 397,980.60 is: 549,225.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,743.16 : 965,666.86 = 397,980.60 : x
  2. Step 2: Convert to fraction form
    699,743.16/965,666.86 = 397,980.60/x
  3. Step 3: Cross multiply
    699,743.16x = 965,666.86 × 397,980.60
  4. Step 4: Simplify right side
    699,743.16x = 384,316,676,342.92
  5. Step 5: Solve for x
    x = 384,316,676,342.92/699,743.16
  6. Step 6: Final answer
    x = 549,225.34

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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.