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Finding the Fourth Proportional to 640,477.63, 883,827.34 and 353,990.35

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Solution

The fourth proportional to 640,477.63, 883,827.34 and 353,990.35 is: 488,489.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,477.63 : 883,827.34 = 353,990.35 : x
  2. Step 2: Convert to fraction form
    640,477.63/883,827.34 = 353,990.35/x
  3. Step 3: Cross multiply
    640,477.63x = 883,827.34 × 353,990.35
  4. Step 4: Simplify right side
    640,477.63x = 312,866,349,426.17
  5. Step 5: Solve for x
    x = 312,866,349,426.17/640,477.63
  6. Step 6: Final answer
    x = 488,489.11

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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.