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Finding the Fourth Proportional to 620,487, 856,178.79 and 348,502.79

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Solution

The fourth proportional to 620,487, 856,178.79 and 348,502.79 is: 480,881.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,487 : 856,178.79 = 348,502.79 : x
  2. Step 2: Convert to fraction form
    620,487/856,178.79 = 348,502.79/x
  3. Step 3: Cross multiply
    620,487x = 856,178.79 × 348,502.79
  4. Step 4: Simplify right side
    620,487x = 298,380,697,887.39
  5. Step 5: Solve for x
    x = 298,380,697,887.39/620,487
  6. Step 6: Final answer
    x = 480,881.47

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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.