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Finding the Fourth Proportional to 640,521.71, 883,829.64 and 364,886.81

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Solution

The fourth proportional to 640,521.71, 883,829.64 and 364,886.81 is: 503,492.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,521.71 : 883,829.64 = 364,886.81 : x
  2. Step 2: Convert to fraction form
    640,521.71/883,829.64 = 364,886.81/x
  3. Step 3: Cross multiply
    640,521.71x = 883,829.64 × 364,886.81
  4. Step 4: Simplify right side
    640,521.71x = 322,497,773,503.90
  5. Step 5: Solve for x
    x = 322,497,773,503.90/640,521.71
  6. Step 6: Final answer
    x = 503,492.34

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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.