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Finding the Fourth Proportional to 617,285.61, 851,665.14 and 402,347.25

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Solution

The fourth proportional to 617,285.61, 851,665.14 and 402,347.25 is: 555,116.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,285.61 : 851,665.14 = 402,347.25 : x
  2. Step 2: Convert to fraction form
    617,285.61/851,665.14 = 402,347.25/x
  3. Step 3: Cross multiply
    617,285.61x = 851,665.14 × 402,347.25
  4. Step 4: Simplify right side
    617,285.61x = 342,665,126,999.87
  5. Step 5: Solve for x
    x = 342,665,126,999.87/617,285.61
  6. Step 6: Final answer
    x = 555,116.01

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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.