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Finding the Fourth Proportional to 559,779.12, 772,495.36 and 318,062

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Solution

The fourth proportional to 559,779.12, 772,495.36 and 318,062 is: 438,925.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,779.12 : 772,495.36 = 318,062 : x
  2. Step 2: Convert to fraction form
    559,779.12/772,495.36 = 318,062/x
  3. Step 3: Cross multiply
    559,779.12x = 772,495.36 × 318,062
  4. Step 4: Simplify right side
    559,779.12x = 245,701,419,192.32
  5. Step 5: Solve for x
    x = 245,701,419,192.32/559,779.12
  6. Step 6: Final answer
    x = 438,925.66

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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.