Home / 659,678.10-989,845.20-260,331.90

Finding the Fourth Proportional to 659,678.10, 989,845.20 and 260,331.90

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Solution

The fourth proportional to 659,678.10, 989,845.20 and 260,331.90 is: 390,627.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,678.10 : 989,845.20 = 260,331.90 : x
  2. Step 2: Convert to fraction form
    659,678.10/989,845.20 = 260,331.90/x
  3. Step 3: Cross multiply
    659,678.10x = 989,845.20 × 260,331.90
  4. Step 4: Simplify right side
    659,678.10x = 257,688,281,621.88
  5. Step 5: Solve for x
    x = 257,688,281,621.88/659,678.10
  6. Step 6: Final answer
    x = 390,627.31

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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.