Home / 645,013.96-890,043.12-383,328.52

Finding the Fourth Proportional to 645,013.96, 890,043.12 and 383,328.52

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Solution

The fourth proportional to 645,013.96, 890,043.12 and 383,328.52 is: 528,948.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,013.96 : 890,043.12 = 383,328.52 : x
  2. Step 2: Convert to fraction form
    645,013.96/890,043.12 = 383,328.52/x
  3. Step 3: Cross multiply
    645,013.96x = 890,043.12 × 383,328.52
  4. Step 4: Simplify right side
    645,013.96x = 341,178,911,925.78
  5. Step 5: Solve for x
    x = 341,178,911,925.78/645,013.96
  6. Step 6: Final answer
    x = 528,948.11

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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.