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Finding the Fourth Proportional to 640,951.64, 884,415 and 368,966.96

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Solution

The fourth proportional to 640,951.64, 884,415 and 368,966.96 is: 509,117.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,951.64 : 884,415 = 368,966.96 : x
  2. Step 2: Convert to fraction form
    640,951.64/884,415 = 368,966.96/x
  3. Step 3: Cross multiply
    640,951.64x = 884,415 × 368,966.96
  4. Step 4: Simplify right side
    640,951.64x = 326,319,913,928.40
  5. Step 5: Solve for x
    x = 326,319,913,928.40/640,951.64
  6. Step 6: Final answer
    x = 509,117.84

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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.