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Finding the Fourth Proportional to 556,002.82, 767,354.95 and 311,001.20

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Solution

The fourth proportional to 556,002.82, 767,354.95 and 311,001.20 is: 429,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,002.82 : 767,354.95 = 311,001.20 : x
  2. Step 2: Convert to fraction form
    556,002.82/767,354.95 = 311,001.20/x
  3. Step 3: Cross multiply
    556,002.82x = 767,354.95 × 311,001.20
  4. Step 4: Simplify right side
    556,002.82x = 238,648,307,684.47
  5. Step 5: Solve for x
    x = 238,648,307,684.47/556,002.82
  6. Step 6: Final answer
    x = 429,221.40

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Double scale
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Similar ratio
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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.