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Finding the Fourth Proportional to 663,077.04, 915,021.72 and 405,385.56

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Solution

The fourth proportional to 663,077.04, 915,021.72 and 405,385.56 is: 559,417.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,077.04 : 915,021.72 = 405,385.56 : x
  2. Step 2: Convert to fraction form
    663,077.04/915,021.72 = 405,385.56/x
  3. Step 3: Cross multiply
    663,077.04x = 915,021.72 × 405,385.56
  4. Step 4: Simplify right side
    663,077.04x = 370,936,592,374.36
  5. Step 5: Solve for x
    x = 370,936,592,374.36/663,077.04
  6. Step 6: Final answer
    x = 559,417.04

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1.5x scale

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.