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Finding the Fourth Proportional to 643,842.24, 888,460.56 and 357,362.40

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Solution

The fourth proportional to 643,842.24, 888,460.56 and 357,362.40 is: 493,136.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,842.24 : 888,460.56 = 357,362.40 : x
  2. Step 2: Convert to fraction form
    643,842.24/888,460.56 = 357,362.40/x
  3. Step 3: Cross multiply
    643,842.24x = 888,460.56 × 357,362.40
  4. Step 4: Simplify right side
    643,842.24x = 317,502,398,026.94
  5. Step 5: Solve for x
    x = 317,502,398,026.94/643,842.24
  6. Step 6: Final answer
    x = 493,136.95

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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.