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Finding the Fourth Proportional to 876,840.76, 1,314,483.54 and 427,310.20

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Solution

The fourth proportional to 876,840.76, 1,314,483.54 and 427,310.20 is: 640,586.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,840.76 : 1,314,483.54 = 427,310.20 : x
  2. Step 2: Convert to fraction form
    876,840.76/1,314,483.54 = 427,310.20/x
  3. Step 3: Cross multiply
    876,840.76x = 1,314,483.54 × 427,310.20
  4. Step 4: Simplify right side
    876,840.76x = 561,692,224,374.11
  5. Step 5: Solve for x
    x = 561,692,224,374.11/876,840.76
  6. Step 6: Final answer
    x = 640,586.35

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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.