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Finding the Fourth Proportional to 321,918.60, 482,877.90 and 144,431.40

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Solution

The fourth proportional to 321,918.60, 482,877.90 and 144,431.40 is: 216,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,918.60 : 482,877.90 = 144,431.40 : x
  2. Step 2: Convert to fraction form
    321,918.60/482,877.90 = 144,431.40/x
  3. Step 3: Cross multiply
    321,918.60x = 482,877.90 × 144,431.40
  4. Step 4: Simplify right side
    321,918.60x = 69,742,731,126.06
  5. Step 5: Solve for x
    x = 69,742,731,126.06/321,918.60
  6. Step 6: Final answer
    x = 216,647.10

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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.