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Finding the Fourth Proportional to 640,068.64, 883,320.08 and 368,136.20

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Solution

The fourth proportional to 640,068.64, 883,320.08 and 368,136.20 is: 508,042.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,068.64 : 883,320.08 = 368,136.20 : x
  2. Step 2: Convert to fraction form
    640,068.64/883,320.08 = 368,136.20/x
  3. Step 3: Cross multiply
    640,068.64x = 883,320.08 × 368,136.20
  4. Step 4: Simplify right side
    640,068.64x = 325,182,097,634.90
  5. Step 5: Solve for x
    x = 325,182,097,634.90/640,068.64
  6. Step 6: Final answer
    x = 508,042.54

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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.