Home / 420,554.16-630,828-105,008.94

Finding the Fourth Proportional to 420,554.16, 630,828 and 105,008.94

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Solution

The fourth proportional to 420,554.16, 630,828 and 105,008.94 is: 157,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,554.16 : 630,828 = 105,008.94 : x
  2. Step 2: Convert to fraction form
    420,554.16/630,828 = 105,008.94/x
  3. Step 3: Cross multiply
    420,554.16x = 630,828 × 105,008.94
  4. Step 4: Simplify right side
    420,554.16x = 66,242,579,602.32
  5. Step 5: Solve for x
    x = 66,242,579,602.32/420,554.16
  6. Step 6: Final answer
    x = 157,512.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.