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Finding the Fourth Proportional to 564,015.48, 778,378.41 and 309,366.69

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Solution

The fourth proportional to 564,015.48, 778,378.41 and 309,366.69 is: 426,946.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,015.48 : 778,378.41 = 309,366.69 : x
  2. Step 2: Convert to fraction form
    564,015.48/778,378.41 = 309,366.69/x
  3. Step 3: Cross multiply
    564,015.48x = 778,378.41 × 309,366.69
  4. Step 4: Simplify right side
    564,015.48x = 240,804,352,269.16
  5. Step 5: Solve for x
    x = 240,804,352,269.16/564,015.48
  6. Step 6: Final answer
    x = 426,946.35

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Double scale
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Similar ratio
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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.