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Finding the Fourth Proportional to 562,878.18, 776,756.70 and 321,156.36

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Solution

The fourth proportional to 562,878.18, 776,756.70 and 321,156.36 is: 443,187.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    562,878.18 : 776,756.70 = 321,156.36 : x
  2. Step 2: Convert to fraction form
    562,878.18/776,756.70 = 321,156.36/x
  3. Step 3: Cross multiply
    562,878.18x = 776,756.70 × 321,156.36
  4. Step 4: Simplify right side
    562,878.18x = 249,460,354,377.61
  5. Step 5: Solve for x
    x = 249,460,354,377.61/562,878.18
  6. Step 6: Final answer
    x = 443,187.11

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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.