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Finding the Fourth Proportional to 684,363.79, 944,428.15 and 378,460.75

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Solution

The fourth proportional to 684,363.79, 944,428.15 and 378,460.75 is: 522,279.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,363.79 : 944,428.15 = 378,460.75 : x
  2. Step 2: Convert to fraction form
    684,363.79/944,428.15 = 378,460.75/x
  3. Step 3: Cross multiply
    684,363.79x = 944,428.15 × 378,460.75
  4. Step 4: Simplify right side
    684,363.79x = 357,428,985,970.11
  5. Step 5: Solve for x
    x = 357,428,985,970.11/684,363.79
  6. Step 6: Final answer
    x = 522,279.22

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Double scale
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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.