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Finding the Fourth Proportional to 659,632.40, 989,016.60 and 260,032.40

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Solution

The fourth proportional to 659,632.40, 989,016.60 and 260,032.40 is: 389,878.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,632.40 : 989,016.60 = 260,032.40 : x
  2. Step 2: Convert to fraction form
    659,632.40/989,016.60 = 260,032.40/x
  3. Step 3: Cross multiply
    659,632.40x = 989,016.60 × 260,032.40
  4. Step 4: Simplify right side
    659,632.40x = 257,176,360,137.84
  5. Step 5: Solve for x
    x = 257,176,360,137.84/659,632.40
  6. Step 6: Final answer
    x = 389,878.30

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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.