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Finding the Fourth Proportional to 679,124.64, 936,987.62 and 407,093.28

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Solution

The fourth proportional to 679,124.64, 936,987.62 and 407,093.28 is: 561,666.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,124.64 : 936,987.62 = 407,093.28 : x
  2. Step 2: Convert to fraction form
    679,124.64/936,987.62 = 407,093.28/x
  3. Step 3: Cross multiply
    679,124.64x = 936,987.62 × 407,093.28
  4. Step 4: Simplify right side
    679,124.64x = 381,441,363,545.19
  5. Step 5: Solve for x
    x = 381,441,363,545.19/679,124.64
  6. Step 6: Final answer
    x = 561,666.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.