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Finding the Fourth Proportional to 426,191.60, 638,509.80 and 346,876.40

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Solution

The fourth proportional to 426,191.60, 638,509.80 and 346,876.40 is: 519,681.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,191.60 : 638,509.80 = 346,876.40 : x
  2. Step 2: Convert to fraction form
    426,191.60/638,509.80 = 346,876.40/x
  3. Step 3: Cross multiply
    426,191.60x = 638,509.80 × 346,876.40
  4. Step 4: Simplify right side
    426,191.60x = 221,483,980,788.72
  5. Step 5: Solve for x
    x = 221,483,980,788.72/426,191.60
  6. Step 6: Final answer
    x = 519,681.71

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1.5x scale

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.