Home / 645,320.95-890,506.35-358,834.89

Finding the Fourth Proportional to 645,320.95, 890,506.35 and 358,834.89

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Solution

The fourth proportional to 645,320.95, 890,506.35 and 358,834.89 is: 495,171.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,320.95 : 890,506.35 = 358,834.89 : x
  2. Step 2: Convert to fraction form
    645,320.95/890,506.35 = 358,834.89/x
  3. Step 3: Cross multiply
    645,320.95x = 890,506.35 × 358,834.89
  4. Step 4: Simplify right side
    645,320.95x = 319,544,748,146.55
  5. Step 5: Solve for x
    x = 319,544,748,146.55/645,320.95
  6. Step 6: Final answer
    x = 495,171.82

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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.