Home / 317,707.09-438,437-172,513.10

Finding the Fourth Proportional to 317,707.09, 438,437 and 172,513.10

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Solution

The fourth proportional to 317,707.09, 438,437 and 172,513.10 is: 238,068.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,707.09 : 438,437 = 172,513.10 : x
  2. Step 2: Convert to fraction form
    317,707.09/438,437 = 172,513.10/x
  3. Step 3: Cross multiply
    317,707.09x = 438,437 × 172,513.10
  4. Step 4: Simplify right side
    317,707.09x = 75,636,126,024.70
  5. Step 5: Solve for x
    x = 75,636,126,024.70/317,707.09
  6. Step 6: Final answer
    x = 238,068.74

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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.