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Finding the Fourth Proportional to 459,626.40, 690,001.20 and 260,085.60

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Solution

The fourth proportional to 459,626.40, 690,001.20 and 260,085.60 is: 390,446.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,626.40 : 690,001.20 = 260,085.60 : x
  2. Step 2: Convert to fraction form
    459,626.40/690,001.20 = 260,085.60/x
  3. Step 3: Cross multiply
    459,626.40x = 690,001.20 × 260,085.60
  4. Step 4: Simplify right side
    459,626.40x = 179,459,376,102.72
  5. Step 5: Solve for x
    x = 179,459,376,102.72/459,626.40
  6. Step 6: Final answer
    x = 390,446.19

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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.