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Finding the Fourth Proportional to 406,322.79, 561,002.54 and 253,420.71

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Solution

The fourth proportional to 406,322.79, 561,002.54 and 253,420.71 is: 349,893.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,322.79 : 561,002.54 = 253,420.71 : x
  2. Step 2: Convert to fraction form
    406,322.79/561,002.54 = 253,420.71/x
  3. Step 3: Cross multiply
    406,322.79x = 561,002.54 × 253,420.71
  4. Step 4: Simplify right side
    406,322.79x = 142,169,660,731.50
  5. Step 5: Solve for x
    x = 142,169,660,731.50/406,322.79
  6. Step 6: Final answer
    x = 349,893.40

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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.