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Finding the Fourth Proportional to 870,318, 1,307,478.24 and 618,211.44

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Solution

The fourth proportional to 870,318, 1,307,478.24 and 618,211.44 is: 928,738.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,318 : 1,307,478.24 = 618,211.44 : x
  2. Step 2: Convert to fraction form
    870,318/1,307,478.24 = 618,211.44/x
  3. Step 3: Cross multiply
    870,318x = 1,307,478.24 × 618,211.44
  4. Step 4: Simplify right side
    870,318x = 808,298,005,519.07
  5. Step 5: Solve for x
    x = 808,298,005,519.07/870,318
  6. Step 6: Final answer
    x = 928,738.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.