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Finding the Fourth Proportional to 389,465.60, 583,564.80 and 352,140.80

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Solution

The fourth proportional to 389,465.60, 583,564.80 and 352,140.80 is: 527,638.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,465.60 : 583,564.80 = 352,140.80 : x
  2. Step 2: Convert to fraction form
    389,465.60/583,564.80 = 352,140.80/x
  3. Step 3: Cross multiply
    389,465.60x = 583,564.80 × 352,140.80
  4. Step 4: Simplify right side
    389,465.60x = 205,496,975,523.84
  5. Step 5: Solve for x
    x = 205,496,975,523.84/389,465.60
  6. Step 6: Final answer
    x = 527,638.32

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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.