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Finding the Fourth Proportional to 561,396.48, 774,737.28 and 306,758.40

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Solution

The fourth proportional to 561,396.48, 774,737.28 and 306,758.40 is: 423,332.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,396.48 : 774,737.28 = 306,758.40 : x
  2. Step 2: Convert to fraction form
    561,396.48/774,737.28 = 306,758.40/x
  3. Step 3: Cross multiply
    561,396.48x = 774,737.28 × 306,758.40
  4. Step 4: Simplify right side
    561,396.48x = 237,657,168,433.15
  5. Step 5: Solve for x
    x = 237,657,168,433.15/561,396.48
  6. Step 6: Final answer
    x = 423,332.13

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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.