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Finding the Fourth Proportional to 559,666.28, 772,360.30 and 317,989.82

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Solution

The fourth proportional to 559,666.28, 772,360.30 and 317,989.82 is: 438,837.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,666.28 : 772,360.30 = 317,989.82 : x
  2. Step 2: Convert to fraction form
    559,666.28/772,360.30 = 317,989.82/x
  3. Step 3: Cross multiply
    559,666.28x = 772,360.30 × 317,989.82
  4. Step 4: Simplify right side
    559,666.28x = 245,602,712,772.15
  5. Step 5: Solve for x
    x = 245,602,712,772.15/559,666.28
  6. Step 6: Final answer
    x = 438,837.79

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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.