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Finding the Fourth Proportional to 401,701.80, 601,386.30 and 390,037.80

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Solution

The fourth proportional to 401,701.80, 601,386.30 and 390,037.80 is: 583,924.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,701.80 : 601,386.30 = 390,037.80 : x
  2. Step 2: Convert to fraction form
    401,701.80/601,386.30 = 390,037.80/x
  3. Step 3: Cross multiply
    401,701.80x = 601,386.30 × 390,037.80
  4. Step 4: Simplify right side
    401,701.80x = 234,563,389,402.14
  5. Step 5: Solve for x
    x = 234,563,389,402.14/401,701.80
  6. Step 6: Final answer
    x = 583,924.17

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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.