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Finding the Fourth Proportional to 539,482.40, 808,316.40 and 426,730.40

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Solution

The fourth proportional to 539,482.40, 808,316.40 and 426,730.40 is: 639,378.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,482.40 : 808,316.40 = 426,730.40 : x
  2. Step 2: Convert to fraction form
    539,482.40/808,316.40 = 426,730.40/x
  3. Step 3: Cross multiply
    539,482.40x = 808,316.40 × 426,730.40
  4. Step 4: Simplify right side
    539,482.40x = 344,933,180,698.56
  5. Step 5: Solve for x
    x = 344,933,180,698.56/539,482.40
  6. Step 6: Final answer
    x = 639,378.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.