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Finding the Fourth Proportional to 455,420.40, 682,547.40 and 349,715.40

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Solution

The fourth proportional to 455,420.40, 682,547.40 and 349,715.40 is: 524,125.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,420.40 : 682,547.40 = 349,715.40 : x
  2. Step 2: Convert to fraction form
    455,420.40/682,547.40 = 349,715.40/x
  3. Step 3: Cross multiply
    455,420.40x = 682,547.40 × 349,715.40
  4. Step 4: Simplify right side
    455,420.40x = 238,697,337,009.96
  5. Step 5: Solve for x
    x = 238,697,337,009.96/455,420.40
  6. Step 6: Final answer
    x = 524,125.26

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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.