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Finding the Fourth Proportional to 424,005.76, 636,038.08 and 143,428.16

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Solution

The fourth proportional to 424,005.76, 636,038.08 and 143,428.16 is: 215,152.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,005.76 : 636,038.08 = 143,428.16 : x
  2. Step 2: Convert to fraction form
    424,005.76/636,038.08 = 143,428.16/x
  3. Step 3: Cross multiply
    424,005.76x = 636,038.08 × 143,428.16
  4. Step 4: Simplify right side
    424,005.76x = 91,225,771,504.33
  5. Step 5: Solve for x
    x = 91,225,771,504.33/424,005.76
  6. Step 6: Final answer
    x = 215,152.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.