Home / 645,948.80-891,397.32-359,466.20

Finding the Fourth Proportional to 645,948.80, 891,397.32 and 359,466.20

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Solution

The fourth proportional to 645,948.80, 891,397.32 and 359,466.20 is: 496,056.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,948.80 : 891,397.32 = 359,466.20 : x
  2. Step 2: Convert to fraction form
    645,948.80/891,397.32 = 359,466.20/x
  3. Step 3: Cross multiply
    645,948.80x = 891,397.32 × 359,466.20
  4. Step 4: Simplify right side
    645,948.80x = 320,427,207,310.58
  5. Step 5: Solve for x
    x = 320,427,207,310.58/645,948.80
  6. Step 6: Final answer
    x = 496,056.66

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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.