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Finding the Fourth Proportional to 628,070.92, 866,963.34 and 373,421.50

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Solution

The fourth proportional to 628,070.92, 866,963.34 and 373,421.50 is: 515,455.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,070.92 : 866,963.34 = 373,421.50 : x
  2. Step 2: Convert to fraction form
    628,070.92/866,963.34 = 373,421.50/x
  3. Step 3: Cross multiply
    628,070.92x = 866,963.34 × 373,421.50
  4. Step 4: Simplify right side
    628,070.92x = 323,742,750,867.81
  5. Step 5: Solve for x
    x = 323,742,750,867.81/628,070.92
  6. Step 6: Final answer
    x = 515,455.72

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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.