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Finding the Fourth Proportional to 508,745.10, 702,070.95 and 317,869.20

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Solution

The fourth proportional to 508,745.10, 702,070.95 and 317,869.20 is: 438,661.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,745.10 : 702,070.95 = 317,869.20 : x
  2. Step 2: Convert to fraction form
    508,745.10/702,070.95 = 317,869.20/x
  3. Step 3: Cross multiply
    508,745.10x = 702,070.95 × 317,869.20
  4. Step 4: Simplify right side
    508,745.10x = 223,166,731,219.74
  5. Step 5: Solve for x
    x = 223,166,731,219.74/508,745.10
  6. Step 6: Final answer
    x = 438,661.19

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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.