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Finding the Fourth Proportional to 478,081.47, 716,859.71 and 328,359.45

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Solution

The fourth proportional to 478,081.47, 716,859.71 and 328,359.45 is: 492,358.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,081.47 : 716,859.71 = 328,359.45 : x
  2. Step 2: Convert to fraction form
    478,081.47/716,859.71 = 328,359.45/x
  3. Step 3: Cross multiply
    478,081.47x = 716,859.71 × 328,359.45
  4. Step 4: Simplify right side
    478,081.47x = 235,387,660,102.76
  5. Step 5: Solve for x
    x = 235,387,660,102.76/478,081.47
  6. Step 6: Final answer
    x = 492,358.89

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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.