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Finding the Fourth Proportional to 659,433.60, 989,478.45 and 260,087.40

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Solution

The fourth proportional to 659,433.60, 989,478.45 and 260,087.40 is: 390,260.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,433.60 : 989,478.45 = 260,087.40 : x
  2. Step 2: Convert to fraction form
    659,433.60/989,478.45 = 260,087.40/x
  3. Step 3: Cross multiply
    659,433.60x = 989,478.45 × 260,087.40
  4. Step 4: Simplify right side
    659,433.60x = 257,350,877,416.53
  5. Step 5: Solve for x
    x = 257,350,877,416.53/659,433.60
  6. Step 6: Final answer
    x = 390,260.49

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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.