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Finding the Fourth Proportional to 390,850.40, 539,127.95 and 300,068.03

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Solution

The fourth proportional to 390,850.40, 539,127.95 and 300,068.03 is: 413,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,850.40 : 539,127.95 = 300,068.03 : x
  2. Step 2: Convert to fraction form
    390,850.40/539,127.95 = 300,068.03/x
  3. Step 3: Cross multiply
    390,850.40x = 539,127.95 × 300,068.03
  4. Step 4: Simplify right side
    390,850.40x = 161,775,057,678.46
  5. Step 5: Solve for x
    x = 161,775,057,678.46/390,850.40
  6. Step 6: Final answer
    x = 413,905.32

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1.5x scale

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.