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Finding the Fourth Proportional to 707,720.40, 1,062,018 and 286,999.92

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Solution

The fourth proportional to 707,720.40, 1,062,018 and 286,999.92 is: 430,677.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,720.40 : 1,062,018 = 286,999.92 : x
  2. Step 2: Convert to fraction form
    707,720.40/1,062,018 = 286,999.92/x
  3. Step 3: Cross multiply
    707,720.40x = 1,062,018 × 286,999.92
  4. Step 4: Simplify right side
    707,720.40x = 304,799,081,038.56
  5. Step 5: Solve for x
    x = 304,799,081,038.56/707,720.40
  6. Step 6: Final answer
    x = 430,677.26

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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.