Home / 387,420.31-581,136.32-147,547.50

Finding the Fourth Proportional to 387,420.31, 581,136.32 and 147,547.50

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Solution

The fourth proportional to 387,420.31, 581,136.32 and 147,547.50 is: 221,323.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,420.31 : 581,136.32 = 147,547.50 : x
  2. Step 2: Convert to fraction form
    387,420.31/581,136.32 = 147,547.50/x
  3. Step 3: Cross multiply
    387,420.31x = 581,136.32 × 147,547.50
  4. Step 4: Simplify right side
    387,420.31x = 85,745,207,531.78
  5. Step 5: Solve for x
    x = 85,745,207,531.78/387,420.31
  6. Step 6: Final answer
    x = 221,323.47

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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.