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Finding the Fourth Proportional to 911,781.60, 1,367,672.40 and 406,341.60

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Solution

The fourth proportional to 911,781.60, 1,367,672.40 and 406,341.60 is: 609,512.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,781.60 : 1,367,672.40 = 406,341.60 : x
  2. Step 2: Convert to fraction form
    911,781.60/1,367,672.40 = 406,341.60/x
  3. Step 3: Cross multiply
    911,781.60x = 1,367,672.40 × 406,341.60
  4. Step 4: Simplify right side
    911,781.60x = 555,742,191,291.84
  5. Step 5: Solve for x
    x = 555,742,191,291.84/911,781.60
  6. Step 6: Final answer
    x = 609,512.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.