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Finding the Fourth Proportional to 659,530.60, 989,295.90 and 260,038.60

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Solution

The fourth proportional to 659,530.60, 989,295.90 and 260,038.60 is: 390,057.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,530.60 : 989,295.90 = 260,038.60 : x
  2. Step 2: Convert to fraction form
    659,530.60/989,295.90 = 260,038.60/x
  3. Step 3: Cross multiply
    659,530.60x = 989,295.90 × 260,038.60
  4. Step 4: Simplify right side
    659,530.60x = 257,255,120,821.74
  5. Step 5: Solve for x
    x = 257,255,120,821.74/659,530.60
  6. Step 6: Final answer
    x = 390,057.90

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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.