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Finding the Fourth Proportional to 660,578.76, 911,603.35 and 358,772.76

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Solution

The fourth proportional to 660,578.76, 911,603.35 and 358,772.76 is: 495,108.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,578.76 : 911,603.35 = 358,772.76 : x
  2. Step 2: Convert to fraction form
    660,578.76/911,603.35 = 358,772.76/x
  3. Step 3: Cross multiply
    660,578.76x = 911,603.35 × 358,772.76
  4. Step 4: Simplify right side
    660,578.76x = 327,058,449,904.75
  5. Step 5: Solve for x
    x = 327,058,449,904.75/660,578.76
  6. Step 6: Final answer
    x = 495,108.94

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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.