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Finding the Fourth Proportional to 645,706.98, 891,063.45 and 359,226.18

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Solution

The fourth proportional to 645,706.98, 891,063.45 and 359,226.18 is: 495,725.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,706.98 : 891,063.45 = 359,226.18 : x
  2. Step 2: Convert to fraction form
    645,706.98/891,063.45 = 359,226.18/x
  3. Step 3: Cross multiply
    645,706.98x = 891,063.45 × 359,226.18
  4. Step 4: Simplify right side
    645,706.98x = 320,093,319,281.12
  5. Step 5: Solve for x
    x = 320,093,319,281.12/645,706.98
  6. Step 6: Final answer
    x = 495,725.35

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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.