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Finding the Fourth Proportional to 640,521.20, 883,828.95 and 364,886.30

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Solution

The fourth proportional to 640,521.20, 883,828.95 and 364,886.30 is: 503,491.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,521.20 : 883,828.95 = 364,886.30 : x
  2. Step 2: Convert to fraction form
    640,521.20/883,828.95 = 364,886.30/x
  3. Step 3: Cross multiply
    640,521.20x = 883,828.95 × 364,886.30
  4. Step 4: Simplify right side
    640,521.20x = 322,497,075,398.39
  5. Step 5: Solve for x
    x = 322,497,075,398.39/640,521.20
  6. Step 6: Final answer
    x = 503,491.65

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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.