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Finding the Fourth Proportional to 643,159.10, 887,501.40 and 356,678.30

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Solution

The fourth proportional to 643,159.10, 887,501.40 and 356,678.30 is: 492,183.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,159.10 : 887,501.40 = 356,678.30 : x
  2. Step 2: Convert to fraction form
    643,159.10/887,501.40 = 356,678.30/x
  3. Step 3: Cross multiply
    643,159.10x = 887,501.40 × 356,678.30
  4. Step 4: Simplify right side
    643,159.10x = 316,552,490,599.62
  5. Step 5: Solve for x
    x = 316,552,490,599.62/643,159.10
  6. Step 6: Final answer
    x = 492,183.80

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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.