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Finding the Fourth Proportional to 556,465, 767,921.70 and 318,001

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Solution

The fourth proportional to 556,465, 767,921.70 and 318,001 is: 438,841.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,465 : 767,921.70 = 318,001 : x
  2. Step 2: Convert to fraction form
    556,465/767,921.70 = 318,001/x
  3. Step 3: Cross multiply
    556,465x = 767,921.70 × 318,001
  4. Step 4: Simplify right side
    556,465x = 244,199,868,521.70
  5. Step 5: Solve for x
    x = 244,199,868,521.70/556,465
  6. Step 6: Final answer
    x = 438,841.38

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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.