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Finding the Fourth Proportional to 660,009.64, 910,813.78 and 358,203.64

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Solution

The fourth proportional to 660,009.64, 910,813.78 and 358,203.64 is: 494,321.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,009.64 : 910,813.78 = 358,203.64 : x
  2. Step 2: Convert to fraction form
    660,009.64/910,813.78 = 358,203.64/x
  3. Step 3: Cross multiply
    660,009.64x = 910,813.78 × 358,203.64
  4. Step 4: Simplify right side
    660,009.64x = 326,256,811,358.16
  5. Step 5: Solve for x
    x = 326,256,811,358.16/660,009.64
  6. Step 6: Final answer
    x = 494,321.28

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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.