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Finding the Fourth Proportional to 652,386.60, 978,579.90 and 439,810.20

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Solution

The fourth proportional to 652,386.60, 978,579.90 and 439,810.20 is: 659,715.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,386.60 : 978,579.90 = 439,810.20 : x
  2. Step 2: Convert to fraction form
    652,386.60/978,579.90 = 439,810.20/x
  3. Step 3: Cross multiply
    652,386.60x = 978,579.90 × 439,810.20
  4. Step 4: Simplify right side
    652,386.60x = 430,389,421,534.98
  5. Step 5: Solve for x
    x = 430,389,421,534.98/652,386.60
  6. Step 6: Final answer
    x = 659,715.30

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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.