Home / 645,442.74-890,642.61-358,916.58

Finding the Fourth Proportional to 645,442.74, 890,642.61 and 358,916.58

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Solution

The fourth proportional to 645,442.74, 890,642.61 and 358,916.58 is: 495,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,442.74 : 890,642.61 = 358,916.58 : x
  2. Step 2: Convert to fraction form
    645,442.74/890,642.61 = 358,916.58/x
  3. Step 3: Cross multiply
    645,442.74x = 890,642.61 × 358,916.58
  4. Step 4: Simplify right side
    645,442.74x = 319,666,399,583.47
  5. Step 5: Solve for x
    x = 319,666,399,583.47/645,442.74
  6. Step 6: Final answer
    x = 495,266.86

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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.