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Finding the Fourth Proportional to 583,911.72, 805,799.34 and 315,639.72

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Solution

The fourth proportional to 583,911.72, 805,799.34 and 315,639.72 is: 435,583.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,911.72 : 805,799.34 = 315,639.72 : x
  2. Step 2: Convert to fraction form
    583,911.72/805,799.34 = 315,639.72/x
  3. Step 3: Cross multiply
    583,911.72x = 805,799.34 × 315,639.72
  4. Step 4: Simplify right side
    583,911.72x = 254,342,278,053.79
  5. Step 5: Solve for x
    x = 254,342,278,053.79/583,911.72
  6. Step 6: Final answer
    x = 435,583.44

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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.