Home / 498,931.65-688,330.31-307,612.89

Finding the Fourth Proportional to 498,931.65, 688,330.31 and 307,612.89

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Solution

The fourth proportional to 498,931.65, 688,330.31 and 307,612.89 is: 424,385.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,931.65 : 688,330.31 = 307,612.89 : x
  2. Step 2: Convert to fraction form
    498,931.65/688,330.31 = 307,612.89/x
  3. Step 3: Cross multiply
    498,931.65x = 688,330.31 × 307,612.89
  4. Step 4: Simplify right side
    498,931.65x = 211,739,274,395.63
  5. Step 5: Solve for x
    x = 211,739,274,395.63/498,931.65
  6. Step 6: Final answer
    x = 424,385.33

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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.