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Finding the Fourth Proportional to 478,426.40, 718,417.20 and 346,234.40

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Solution

The fourth proportional to 478,426.40, 718,417.20 and 346,234.40 is: 519,914.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,426.40 : 718,417.20 = 346,234.40 : x
  2. Step 2: Convert to fraction form
    478,426.40/718,417.20 = 346,234.40/x
  3. Step 3: Cross multiply
    478,426.40x = 718,417.20 × 346,234.40
  4. Step 4: Simplify right side
    478,426.40x = 248,740,748,191.68
  5. Step 5: Solve for x
    x = 248,740,748,191.68/478,426.40
  6. Step 6: Final answer
    x = 519,914.34

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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.