Home / 399,328.04-551,068.46-218,039.40

Finding the Fourth Proportional to 399,328.04, 551,068.46 and 218,039.40

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Solution

The fourth proportional to 399,328.04, 551,068.46 and 218,039.40 is: 300,892.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,328.04 : 551,068.46 = 218,039.40 : x
  2. Step 2: Convert to fraction form
    399,328.04/551,068.46 = 218,039.40/x
  3. Step 3: Cross multiply
    399,328.04x = 551,068.46 × 218,039.40
  4. Step 4: Simplify right side
    399,328.04x = 120,154,636,377.32
  5. Step 5: Solve for x
    x = 120,154,636,377.32/399,328.04
  6. Step 6: Final answer
    x = 300,892.06

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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.