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Finding the Fourth Proportional to 657,423, 907,244.55 and 355,617

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Solution

The fourth proportional to 657,423, 907,244.55 and 355,617 is: 490,751.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,423 : 907,244.55 = 355,617 : x
  2. Step 2: Convert to fraction form
    657,423/907,244.55 = 355,617/x
  3. Step 3: Cross multiply
    657,423x = 907,244.55 × 355,617
  4. Step 4: Simplify right side
    657,423x = 322,631,585,137.35
  5. Step 5: Solve for x
    x = 322,631,585,137.35/657,423
  6. Step 6: Final answer
    x = 490,751.90

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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.