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Finding the Fourth Proportional to 659,440.80, 989,420.40 and 260,013.60

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Solution

The fourth proportional to 659,440.80, 989,420.40 and 260,013.60 is: 390,122.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,440.80 : 989,420.40 = 260,013.60 : x
  2. Step 2: Convert to fraction form
    659,440.80/989,420.40 = 260,013.60/x
  3. Step 3: Cross multiply
    659,440.80x = 989,420.40 × 260,013.60
  4. Step 4: Simplify right side
    659,440.80x = 257,262,760,117.44
  5. Step 5: Solve for x
    x = 257,262,760,117.44/659,440.80
  6. Step 6: Final answer
    x = 390,122.60

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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.