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Finding the Fourth Proportional to 556,148.58, 767,483.01 and 311,133.90

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Solution

The fourth proportional to 556,148.58, 767,483.01 and 311,133.90 is: 429,363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,148.58 : 767,483.01 = 311,133.90 : x
  2. Step 2: Convert to fraction form
    556,148.58/767,483.01 = 311,133.90/x
  3. Step 3: Cross multiply
    556,148.58x = 767,483.01 × 311,133.90
  4. Step 4: Simplify right side
    556,148.58x = 238,789,982,085.04
  5. Step 5: Solve for x
    x = 238,789,982,085.04/556,148.58
  6. Step 6: Final answer
    x = 429,363.65

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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.