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Finding the Fourth Proportional to 660,007.40, 910,810.59 and 358,201.40

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Solution

The fourth proportional to 660,007.40, 910,810.59 and 358,201.40 is: 494,318.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,007.40 : 910,810.59 = 358,201.40 : x
  2. Step 2: Convert to fraction form
    660,007.40/910,810.59 = 358,201.40/x
  3. Step 3: Cross multiply
    660,007.40x = 910,810.59 × 358,201.40
  4. Step 4: Simplify right side
    660,007.40x = 326,253,623,918.77
  5. Step 5: Solve for x
    x = 326,253,623,918.77/660,007.40
  6. Step 6: Final answer
    x = 494,318.13

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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.