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Finding the Fourth Proportional to 608,130.74, 839,019.84 and 390,461.37

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Solution

The fourth proportional to 608,130.74, 839,019.84 and 390,461.37 is: 538,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,130.74 : 839,019.84 = 390,461.37 : x
  2. Step 2: Convert to fraction form
    608,130.74/839,019.84 = 390,461.37/x
  3. Step 3: Cross multiply
    608,130.74x = 839,019.84 × 390,461.37
  4. Step 4: Simplify right side
    608,130.74x = 327,604,834,080.96
  5. Step 5: Solve for x
    x = 327,604,834,080.96/608,130.74
  6. Step 6: Final answer
    x = 538,707.90

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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.