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Finding the Fourth Proportional to 559,689.86, 772,392.65 and 318,013.36

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Solution

The fourth proportional to 559,689.86, 772,392.65 and 318,013.36 is: 438,870.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,689.86 : 772,392.65 = 318,013.36 : x
  2. Step 2: Convert to fraction form
    559,689.86/772,392.65 = 318,013.36/x
  3. Step 3: Cross multiply
    559,689.86x = 772,392.65 × 318,013.36
  4. Step 4: Simplify right side
    559,689.86x = 245,631,181,241.23
  5. Step 5: Solve for x
    x = 245,631,181,241.23/559,689.86
  6. Step 6: Final answer
    x = 438,870.17

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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.