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Finding the Fourth Proportional to 407,390.80, 571,528.10 and 407,390.80

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Solution

The fourth proportional to 407,390.80, 571,528.10 and 407,390.80 is: 571,528.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,390.80 : 571,528.10 = 407,390.80 : x
  2. Step 2: Convert to fraction form
    407,390.80/571,528.10 = 407,390.80/x
  3. Step 3: Cross multiply
    407,390.80x = 571,528.10 × 407,390.80
  4. Step 4: Simplify right side
    407,390.80x = 232,835,289,881.48
  5. Step 5: Solve for x
    x = 232,835,289,881.48/407,390.80
  6. Step 6: Final answer
    x = 571,528.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.