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Finding the Fourth Proportional to 663,319.36, 915,381.60 and 361,513.36

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Solution

The fourth proportional to 663,319.36, 915,381.60 and 361,513.36 is: 498,888.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,319.36 : 915,381.60 = 361,513.36 : x
  2. Step 2: Convert to fraction form
    663,319.36/915,381.60 = 361,513.36/x
  3. Step 3: Cross multiply
    663,319.36x = 915,381.60 × 361,513.36
  4. Step 4: Simplify right side
    663,319.36x = 330,922,677,898.18
  5. Step 5: Solve for x
    x = 330,922,677,898.18/663,319.36
  6. Step 6: Final answer
    x = 498,888.92

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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.