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Finding the Fourth Proportional to 716,048.42, 988,172.18 and 393,783.02

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Solution

The fourth proportional to 716,048.42, 988,172.18 and 393,783.02 is: 543,434.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,048.42 : 988,172.18 = 393,783.02 : x
  2. Step 2: Convert to fraction form
    716,048.42/988,172.18 = 393,783.02/x
  3. Step 3: Cross multiply
    716,048.42x = 988,172.18 × 393,783.02
  4. Step 4: Simplify right side
    716,048.42x = 389,125,425,320.38
  5. Step 5: Solve for x
    x = 389,125,425,320.38/716,048.42
  6. Step 6: Final answer
    x = 543,434.51

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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.