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Finding the Fourth Proportional to 615,279.90, 921,364.65 and 403,772.70

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Solution

The fourth proportional to 615,279.90, 921,364.65 and 403,772.70 is: 604,638.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,279.90 : 921,364.65 = 403,772.70 : x
  2. Step 2: Convert to fraction form
    615,279.90/921,364.65 = 403,772.70/x
  3. Step 3: Cross multiply
    615,279.90x = 921,364.65 × 403,772.70
  4. Step 4: Simplify right side
    615,279.90x = 372,021,892,415.06
  5. Step 5: Solve for x
    x = 372,021,892,415.06/615,279.90
  6. Step 6: Final answer
    x = 604,638.46

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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.