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Finding the Fourth Proportional to 559,538.98, 772,139.65 and 317,820.81

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Solution

The fourth proportional to 559,538.98, 772,139.65 and 317,820.81 is: 438,579.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,538.98 : 772,139.65 = 317,820.81 : x
  2. Step 2: Convert to fraction form
    559,538.98/772,139.65 = 317,820.81/x
  3. Step 3: Cross multiply
    559,538.98x = 772,139.65 × 317,820.81
  4. Step 4: Simplify right side
    559,538.98x = 245,402,048,996.12
  5. Step 5: Solve for x
    x = 245,402,048,996.12/559,538.98
  6. Step 6: Final answer
    x = 438,579.00

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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.