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Finding the Fourth Proportional to 407,389.80, 571,526.70 and 407,389.80

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Solution

The fourth proportional to 407,389.80, 571,526.70 and 407,389.80 is: 571,526.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,389.80 : 571,526.70 = 407,389.80 : x
  2. Step 2: Convert to fraction form
    407,389.80/571,526.70 = 407,389.80/x
  3. Step 3: Cross multiply
    407,389.80x = 571,526.70 × 407,389.80
  4. Step 4: Simplify right side
    407,389.80x = 232,834,148,007.66
  5. Step 5: Solve for x
    x = 232,834,148,007.66/407,389.80
  6. Step 6: Final answer
    x = 571,526.70

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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.