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Finding the Fourth Proportional to 459,708.40, 688,007.40 and 403,721.20

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Solution

The fourth proportional to 459,708.40, 688,007.40 and 403,721.20 is: 604,216.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,708.40 : 688,007.40 = 403,721.20 : x
  2. Step 2: Convert to fraction form
    459,708.40/688,007.40 = 403,721.20/x
  3. Step 3: Cross multiply
    459,708.40x = 688,007.40 × 403,721.20
  4. Step 4: Simplify right side
    459,708.40x = 277,763,173,136.88
  5. Step 5: Solve for x
    x = 277,763,173,136.88/459,708.40
  6. Step 6: Final answer
    x = 604,216.01

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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.