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Finding the Fourth Proportional to 716,146.50, 988,307.01 and 393,880.98

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Solution

The fourth proportional to 716,146.50, 988,307.01 and 393,880.98 is: 543,569.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,146.50 : 988,307.01 = 393,880.98 : x
  2. Step 2: Convert to fraction form
    716,146.50/988,307.01 = 393,880.98/x
  3. Step 3: Cross multiply
    716,146.50x = 988,307.01 × 393,880.98
  4. Step 4: Simplify right side
    716,146.50x = 389,275,333,639.67
  5. Step 5: Solve for x
    x = 389,275,333,639.67/716,146.50
  6. Step 6: Final answer
    x = 543,569.41

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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.