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Finding the Fourth Proportional to 680,742.65, 939,417.10 and 374,812.65

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Solution

The fourth proportional to 680,742.65, 939,417.10 and 374,812.65 is: 517,237.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,742.65 : 939,417.10 = 374,812.65 : x
  2. Step 2: Convert to fraction form
    680,742.65/939,417.10 = 374,812.65/x
  3. Step 3: Cross multiply
    680,742.65x = 939,417.10 × 374,812.65
  4. Step 4: Simplify right side
    680,742.65x = 352,105,411,769.28
  5. Step 5: Solve for x
    x = 352,105,411,769.28/680,742.65
  6. Step 6: Final answer
    x = 517,237.18

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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.