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Finding the Fourth Proportional to 640,702.80, 884,235.60 and 368,780.88

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Solution

The fourth proportional to 640,702.80, 884,235.60 and 368,780.88 is: 508,955.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,702.80 : 884,235.60 = 368,780.88 : x
  2. Step 2: Convert to fraction form
    640,702.80/884,235.60 = 368,780.88/x
  3. Step 3: Cross multiply
    640,702.80x = 884,235.60 × 368,780.88
  4. Step 4: Simplify right side
    640,702.80x = 326,089,182,695.33
  5. Step 5: Solve for x
    x = 326,089,182,695.33/640,702.80
  6. Step 6: Final answer
    x = 508,955.45

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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.