Home / 645,458.02-890,727.16-355,063.35

Finding the Fourth Proportional to 645,458.02, 890,727.16 and 355,063.35

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Solution

The fourth proportional to 645,458.02, 890,727.16 and 355,063.35 is: 489,984.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,458.02 : 890,727.16 = 355,063.35 : x
  2. Step 2: Convert to fraction form
    645,458.02/890,727.16 = 355,063.35/x
  3. Step 3: Cross multiply
    645,458.02x = 890,727.16 × 355,063.35
  4. Step 4: Simplify right side
    645,458.02x = 316,264,569,365.59
  5. Step 5: Solve for x
    x = 316,264,569,365.59/645,458.02
  6. Step 6: Final answer
    x = 489,984.72

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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.